The Turks continued their progress; in 1363 they captured Philippopolis, and in 1365 they entered Adrianople; the whole Balkan peninsula was threatened, and even Hungary itself seemed doomed.
Three years later, in 1364, Philippopolis fell to Lala Shahin, the Turkish commander in.
That they instituted a rival congress of their own in Philippopolis is improbable.
But the separation of Eastern Rumelia isolated Adrianople, and transferred to Philippopolis at least two-thirds of its foreign trade which, as regards sea-borne merchandise, is carried on through the port of Burgas.
Under Turkish rule the Bogomils lived unmolested as Pavlikeni in their ancient stronghold near Philippopolis, and farther northward.
They are seldom found in large numbers at any great distance from the sea, and usually congregate in the principal towns and commercial centres, such as Adrianople, Constantza, Varna and Philippopolis; there are also detached colonies at Melnik, Stanimaka, Kavakly, Niegush and elsewhere.
Varna is the third city of the kingdom in population, after Sofia and Philippopolis, and ranks with Burgas as one of the two principal seaports.
It seems that he was at first treated well as a valuable hostage, but was sacrificed by the Bulgarian monarch in a sudden outburst of rage, perhaps in consequence of the revolt of Philippopolis, which passed into the hands of the Franks.
After the Russo-Turkish War of 1878 he went to Philippopolis as Austro-Hungarian envoy extraordinary on the International Eastern Rumelian Commission.