In the 1600s an Ethiopian emperor by the name of Fasilides (1603-1667) built a large castle and established its location (Gondar) as Ethiopias capital. The castle is known as Fasil Ghebbi and covers abour 70,000 square meters (17 acres).
Source (By Hgetnet (Own work) [CC0], via Wikimedia Commons)
Although it has a very unique architecture, it also resembles European castles of the same time period. Most likely that is no coincidence. During the rule of Fasilides, Ethiopia was a very powerful kingdom with contacts to Europe and India.
We are not responsible for the contents of external links. Full disclaimer can be found here.
Top image By Francesco Bandarin [CC BY-SA 3.0-igo (http://creativecommons.org/licenses/by-sa/3.0-igo)], via Wikimedia Commons