Palace of Ctesiphon (Taq Kasra)

Sassanid-era Persian culture (?), with hypothetical date of construction, 540 C.E.; this date is controversial with some researchers claiming construction as early at 2100 BCE; located near modern Salman Pak, close to Bagdad, Iraq. The archway is the largest single-span vault of unreinforced adobe brickwork in the world.

Elevation is c. 6 meters (19.69 feet) above sea level.

Material: Unfired adobe brick.

Data forCG model:
1. https://www.google.com/search?biw=1276&bih=1507&tbm=isch&sa=1&ei=hPe0WrW7JI7AjwPI-IbQBg&q=taq+kasra&oq=Taq+Kasra&gs_l=psy-ab.1.0.0l3j0i8i30k1j0i24k1l4.32731.32731.0.34868.1.1.0.0.0.0.123.123.0j1.1.0....0...1c.2.64.psy-ab..0.1.123....0.j9vvRbXP2Ys
2. Williams, Chris J K,, 2014. Shell Structures , Univerisity of Bath, UK.
( http://people.bath.ac.uk/abscjkw/LectureNotes/what-is-a-shell.pdf ).
3. https://www.pinterest.com/offsite/?token=361-796&url=http%3A%2F%2Fwww.kavehfarrokh.com%2Fwp-content%2Fuploads%2F2011%2F08%2FPlans-for-Ctesiphon.jpg&pin=507499451733520991&client_tracking_params=CwABAAAADDU0NDE4ODQ0MDE5MgA~0
4. Saeidian, Amin, 2011. Windmills in Iran , Department of Architecture, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran; Published by Elixier Historic Preservation.