Here are past answers & discussions on this topic:
[02 Oct. 2012 | 3 c] Flaired Respondent | General Architecture
[02 July 2015 | 52 c] Pre-Modern and Modern Clothing Against Heat
[29 Mar. 2013 | 7 c] Flaired Respondents | Native Americans, Ancient Rome, Medieval Scotland
[14 Mar. 2013 | 15 c] Iran, Italy, Antebellum US South
[15 Aug. 2013 | 37 c] Sourced Answers | US South Before and After Air Conditioning
[08 June 2013 | 27 c] Upper Class Romans, Antiquity
Direct followup questions to specific flaired specialists by commenting with the question and their username with a /u/ appended to it i.e. /u/OldWorldGlory.
Sorry, we don't allow throughout history questions. These tend to produce threads which are collections of trivia, not the in-depth discussions about a particular topic we're looking for. If you have a specific question about a historical event or period or person, please feel free to re-compose your question and submit it again. Alternatively, questions of this type can be directed to more appropriate subreddits, such as /r/history or /r/askhistory.