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The aim of this article is to understand the definitions, trends and gaps currently existing in the literature regarding the concept of void in the built environment.

The method used for this article is based on a bilingual narrative literature review, the authors being fluent both in French and English. The advantage of any literature review is that it allows researchers to gather and analyse existing academic literature on a specific subject. The chosen technique gives a thorough understanding of the study and helps in identifying research gaps. The literature review was sequential, online and used ScienceDirect, Scopus and Sage Knowledge as databases.

There are three main findings regarding this literature review. The first shows that the void is lacking consensus regarding its definition and attributes, yet this is unanimously considered as an existing space in the city. The second finding shows that voids are talking to our emotions and perceptions and more studies could investigate a new planning/design approach in taking this into consideration. At last, the third findings shows that there are some gaps that need to be further researched, such as the difference between Western and Eastern cultures to use voids in architecture.

In compiling 35 articles focussing on the void, this article proposes a valuable source of knowledge regarding this topic, as well as delineates new research directions.

One of the innumerable ways to systemise contemporary European urban projects is to analyse the urban form originates from the master-plan concept. The duality of closed and open urban situations is an excellent conceptual tool for classification. This classification helps us to recognise, understand and represent the diversity of the city, as it is present on each level of a settlement and architecture.

In the case of “Solid-oriented” projects construction and emplacement of buildings are the main goals. The principle of “Solid-oriented” projects are based on two very different, still existing traditions One is the classical European closed block structure, while the other one is the Modernist open urban system. Today we can identify two new approaches combining those two traditions in different ways. Urban transparency preserves streets, the effect of enclosure, and the dominance of buildings. At the same time density is coupled with spaciousness, blocks are fractured and the environment becomes more complex even within one block. The in-between method, based on the idea of structuralism, attempts to balance the importance of mass and space and creates permeable blocks in a new open urban structure. Besides creating urban volumes or buildings in the city, there is a new type of challenge in contemporary urban design. Since the 1990's attention has shifted to cityscape, i.e. to re-interpreting and reforming open spaces. The international literature calls this un-volumetric architecture. The duality of openness and closedness also appears here. While openness seems to dominate urban situations in contemporary cities, buildings are predominantly used in a closed manner.

With future (extreme) change ahead of us, there are many serious problems humankind has to face. The pace of mitigating climate change through an energy transition to renewables is slow, global mean temperature is increasing and sea level seems to rise at an accelerated pace. This puts many livelihoods at risk and communities have to face an uncertain future. Therefore, continuing the way contemporary cities are developing and developed is not an option. The new normal should also be reflected in urbanism. The paper aims to discuss these issues.

In this paper, the answer to this question is sought in understanding traditional attitudes to living and their relation to the land. How these cultures have been capable of coping with disruptions lies in the way their mental paradigm respects their environment. A more resilient future can be achieved when the traditional values of the relation of societies with the land they live on are considered important and indigenous knowledge and perspectives are used to design cities.

Current society seems to have forgotten what it means and how to put into practice sharing resources and space, giving back more to the environment than used to live. Also, mankind seems to be lacking the ability to move and search for the potentials where to live. Furthermore, choosing to live in safe places, hence being less vulnerable for disruptions, is a principle that has long been neglected. These characteristics of traditional cultures are translated in four principles that are valuable in design processes: first, making use of the energy and power a disaster might bring and turning it into an advantage; second, using imagination to anticipate an unknown future; third, accommodating all paces of urban change; and fourth, designing redundancy for flexibility. The use of these principles is illustrated in three Sydney-based examples.

The link between indigenous knowledge and current urban design practice is new.

Amidst the debates on the death or resurgence of public spaces emerges a significant question: how could public spaces that function at different urban scales and cater for diverse collective needs be provided? This article explores the roles and potentials of temporary public spaces in meeting diverse challenges related to the supply and use of urban open spaces. Positioning temporary public spaces within the literature on non-conventional public spaces is conducted with the purpose of identifying those spaces' characteristics. The proposed definition of temporary public spaces is based on their dynamic status of use-rights. Moreover, a conceptual framework based on urban land economics and bid rent theory is used to explain how such spaces transform under the exchange of temporary use-rights to activate vacant urban lots for public activities. This conceptual framework is applied in the case of a grass root approach to the supply of temporary public spaces. The context is Beirut, a city that has lost its public spaces due to wars and is trying to reintroduce them through different supply mechanisms. The examples illustrate how homogeneous urban spaces are identified over time and converted into heterogeneous and lively temporary public spaces. These contribute towards conviviality in a highly fragmented and multi-cultural society and animate everyday urban life.

Although urban agricultural programs rarely alleviate the pressures of food insecurity on a large scale, community gardens and urban farms are still cropping up in underserved communities and gentrifying areas of redevelopment. This paper identifies the purposes these programs serve for their communities and argues that with government support, grassroots approaches can combat complex problems. Using qualitative and quantitative sources employing a wide range of social research methodology to establish triangulation including but not limited to: case studies; interviews, quantitative analysis of land values; comparative analyses of vacant land policies; urban archives news documents and photographs; empirical models of urban land use and food distribution. The study illustrates the community food garden as an oasis from the typical threats of food insecurity, violence, and sexual harassment urban areas often pose. This collection of qualitative data support existing literature which states that if maintained, community agricultural projects result in a multitude of social, economic, environmental, and physical health benefits. Finally, this paper suggests that with proper support, these small programs can have larger societal impacts. This paper views community agricultural projects as an overlooked vehicle for social and structural change. Community members know the struggles in their neighborhoods best; Grassroots programs like urban gardens leverage social dynamics that create sustainable change.

The purpose of this paper is to develop an approach to urban environment management through analysis of “urban emptiness” based on user-generated big data.

The research design is based on creating a theoretical model of urban emptiness as a multilayer phenomenon in the city space and then developing an applied approach to map its different types through user-generated and open big data from multiple online sources.

The paper provides a definition and a theoretical model of “urban emptiness” as a multilayer phenomenon integrated into the complexity of the city system and as a resource for sustainable urban development. The paper presents a methodological approach to analyse urban emptiness based on spontaneous user-generated geolocated open data emerging online. This approach is applied to the Russian city of St Petersburg with a demonstration of the data set formation based on multiple sources and an interpretation of the preliminary results.

The paper focuses on the under-researched phenomenon of urban emptiness, which leads to a certain speculation of propositions and lack of generalisability of the results. Therefore, the researchers are encouraged to further test the proposed propositions.

The paper describes urban emptiness as a resource in urban development and gives recommendations on how to account for it in sustainable urban environment management, in particular, in limiting urban sprawl.

This paper consolidates data-driven methods to create an integrated approach to urban environment management from an original standpoint – analysis of urban emptiness.

This study aims to demonstrate how women's involvement in urban planning and design in Gulf cities improves urban space's inclusivity and strengthens identity through cultural heritage revitalisation. It also promotes the participation of women in architecture and city-making by showcasing how shaping urban spaces offers local communities opportunities for social interaction and a more inclusive environment.

The paper critically compares two case studies in the Gulf region—one in the United Arab Emirates and the other in Bahrain—according to four inclusion criteria: context connection, cultural sensitivity, community engagement and choices of amenities. These inclusion criteria are also applied to an experimental project by women architects' students in Saudi Arabia to inspire the future female architects of the Gulf region. From urban to architectural scales, the project offers a glance into the heritage design by women architects.

In light of this critical analysis, this study highlights the sensitivity to issues related to the revitalisation of urban areas by women architects. The case studies identified show the role of the female architect in making architecture and linking cultural heritage with contemporary themes. These projects stitch the past with the present and link cultural identity with aspects related to sustainable architecture. Therefore, valorising women's architectural experience is necessary to contribute to sustainable urban development in the Gulf region and beyond.

The present study addresses the importance of the role of women architects in the Gulf region. The research promotes the full and equal participation of women in the architecture and construction of the city to recognise their achievements by increasing their involvement in the work in a more integrated and balanced way.

Urban design has historically occupied the gap between architecture and planning. Although there have long been calls for the discipline to bridge this gap, urban design has continued to lean more heavily on design than planning. The efforts to revitalize downtown Toledo, a mid-western U.S. town experiencing steep economic decline, present a classic example of the potentially unfortunate results of this approach. Over the past three decades, there have been many attempts to revitalize the city, especially its downtown, by constructing several large public buildings, all within a few blocks of each other, all designed with little attention to each other or to the surrounding public spaces, and with a remarkable lack of civic engagement.

Responding to calls in the literature for inter-disciplinarity in urban design, and to the city's experience with urban design, the authors created a collaborative studio for architects and planners from two neighboring universities with two purposes: first, to establish a collaborative work environment where any design interventions would be firmly rooted in the planning context (i.e., to erase boundaries between architects and planners); second, to draw lessons from this experience for the practice and teaching of urban design.

Despite the difficulties of collaborating, architects and planners benefited from exposure to each other, learning about each other's work, as well as learning to collaborate. The interdisciplinary teams developed richer proposals than the architect-only teams. Finally, critical engagement with the community is essential to shaping downtown development.

In the past years, the importance of the cultural economy has led urbanism to a new perspective. Simultaneously, the main international institutions have pointed out the need to shift the urban economy into a sustainable one, green and energy efficient. The confluence of both flows explains why the imaginaries of the urban future are related to the concept of creative cities. Hence, the new economic engine of the cities should be founded on art, creativity and culture, all of them understood as clean energies. This study aims to show the crucial role of cultural heritage as a propeller of a new kind of urban development, more flexible and democratic, based on the construction of the city as a communicational, collective and open effort. Therefore, the city is conceived as a cultural heritage platform where tangible and intangible, social and creative interactions happen. Within this context, urban narratives appear as a dynamic material drawn on the possibilities offered by the heritage received from the past as a resource to be used for re-thinking and re-shaping the future.

The approach of this paper is based on a profound analysis of historical cities, mainly in the European context, supported by the work carried out within the H2020 ROCK project. The cities within the project are: Athens, Bologna, Cluj-Napoca, Eindhoven, Lisbon, Liverpool, Lyon, Torino, Skopje and Vilnius. A wide variety of case studies coming mainly from these cities have been considered to understand better the theoretical point of view on the role of heritage, urban development and city branding. The information about cultural heritage projects used as case studies has been collected and selected coming from the direct work made on the field and the communication open with institutions and cultural stakeholders in every city. Even more, parallel seminars on cultural heritage and city branding organized within the project have allowed the authors to gather very valuable, updated and fresh information on these issues in every particular case.

The study proves that cultural heritage has been traditionally underrated as a mechanism for developing the future of the city and its communicative strategy. Cultural heritage appears as a practical tool for constructing more cohesive urban communities based on the use of public space and shared memories as storytelling platforms. The capacity of resiliency and sustainability revealed by cultural heritage through the time is, as well, a clear reference to construct a potential sustainable city, socially, culturally and environmentally.

Cultural heritage projects are shown as a perfect way to build stronger communities. Through the engagement and participation of citizens, urban storytelling reinforces a more open, real and sustainable city able to face the challenges of contemporary life (gentrification, pollution, mobility, etc.). Like that, heritage appears as a feasible tool for including citizens coming from all ages and backgrounds in the construction of a collective narrative of the city, based on the past and looking at the foreseen.

This study tries to relate fields that traditionally have remained not well connected: urban development, city branding and cultural heritage. The study demonstrates that cultural heritage is crucial as an urban narrative tool and consequently, as a planning/branding mechanism. Moreover, cultural institutions and cultural projects are very relevant platforms for social interaction, inviting citizens to have a more active role in the construction of the city as a collective communicational effort based on a network of social and cultural relations. Storytelling turns up as a new key element for communicating the city from grassroots, in a sustainable, democratic and inclusive manner, far away from the traditional top-down official perspective. Crowdsourcing methods are very powerful for establishing a shared and cohesive city brand, now rooted in its cultural and social foundations and not the marketing campaign clichés. Finally, storytelling emerges as a creative resource that enhances the social, cultural and economic layout of the city, forcing urbanists to include a greener, fairer and more democratic perspective in the future of cities.