Constantinople (once founded as Byzantium) was the capital of several countries - that of the Byzantine Empire first, for a short time of the Latin Empire, and finally after their conquest of the Rum-Seljuks. In 1204 (as OTL), during the Fourth Crusade, the Byzantine Empire was conquered and Constantinople plundered. For many years, the Orthodox people suffered under the fate being servants of the Roman Catholics. Roman king Ottokar I died in 1286 while in Constantinople with his army, having planned another crusade. In May 1852, the peace of Constantinople ended the anti-Russian War.