Speaking of which: can we make a "Sinan" connection
Good spot, on a similar vein we now have a Walter Gropius connection as well, Fagus Works, Bauhaus and Berlin Modernist Housing estates.
How many of the other 57 could even hope to aspire to "World Class"?
Casting a subjective eye over them I think I would put forward: Bikini Atoll
(pretty unique)Palace Stoclet
(incredible interior, rubbish visiting experience) Fagus Works
(One of the most important/ influential modernist buildings, perhaps a push for some but for me it certainly is world class) Jantar Mantar, Jaipur
(was this in the top 50 missing? If not then I forgot to put it forward)
and perhaps Causses & Cevennes
(best cultural landscape to produce a renowned blue sheep's milk cheese :))
Els' review of Caral-Supe
is certainly glowing but would she suggest it is World Class?