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The 7ICCH – Seventh International Congress on Construction History will be held in Lisbon, Portugal, on 12–16 July 2021 (http://www.7icch.org ). The call for abstracts is open till 28 June 2020The general call for abstracts invites proposals as single contributions dealing with a broad range of construction history topics as well as to be included in thematic sessions. Open sessions and thematic ones are listed there : http://www.7icch.org/Topics.htmlPresentationTopics cover a broad range of construction history subjects (construction determinants and their relation with design, extraction and processing of materials, site management, works execution processes, knowledge transfer, actors, machines, tools, building legislation, construction - politics, economy and society, etc. Proposals can approach these subjects from any time period (from ancient times to the 20th century), have any geographical scope (local to intercontinental) and discuss any type of buildings and structures (e.g. vaults; shells; spatial structures; trusses; bridges; industrial/residential/public/religious; stadiums and pavilions; military constructions; infrastructures and public works).Thematic sessions are the result of a previous successful call collecting a significant number of proposals from senior and young researchers coming from all over the world (New Zealand, Australia, China, Mexico, Canada, Germany, Spain, France, Portugal, United Kingdom, Belgium, Russia and Switzerland) aiming to cover important problematics, historical periods and different regions of the globe.InformationEach abstract proposal must not be more than 400 words and submitted before 28 June 2020.After the reviewing process, if your abstract is selected for a paper presentation at the congress, you will be notified by 1 September 2020. The deadline to submit full papers is 15 November 2020.Papers presented at the congress will be published in the 7ICCH Proceedings, which will be available at the conference.The official language of the conference is English.