In 1205 the Bulgarian emperor Kaloyan defeated the Crusader Latin Empire and captured their emperor Baldwin I, who died in captivity in the Bulgarian capital Tarnovo. In response, his successor Henry launched a retaliatory campaign against the Bulgarian cities south of the Balkan Mountains. In 1206 he captured Thermopolis and burned it. His commander Geoffrey of Villehardouin wrote: This was a very beautiful city, well situated, with many warm springs for bathing - the best in the whole world. We took great booty from it. The city never recovered, although the baths were restored.