"Karl Siegfried Döhring (often misspelled Döring; 14 August 1879, in Cologne – 1 June 1941, in Darmstadt; also writing under the pseudonym Ravi Ravendro) was a ...
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German architect, art historian and archaeologist. He lived mostly in Siam, now called Thailand." - (en.wikipedia.org 12.08.2021)
