After the demise of the Komnenoi, the Byzantine economy declined under the impact of several factors: the dismemberment of the Empire after 1204, the successive territorial losses to the Turks (although the strong economic interaction of Byzantine territories with those lost by the Empire continued), and the Italian expansion in the Mediterranean and the Black Sea. When Isaac II Angelos became Emperor in 1185, a mob broke into the palace and carried off pounds of gold, pounds of silver, and 20,000 pounds of bronze coins. In 1195, Holy Roman Emperor Henry VI forced Byzantine Emperor Alexios III Angelos to pay him a tribute of pounds of gold (originally pounds of gold) and in 1204 Alexios III took pounds of gold (or 72,000 "hyperpyra") when he fled Constantinople. The presence of the crusading army not only culminated in a violent sack that dispersed and destroyed the accumulated wealth, and culture of centuries, but was accompanied by a series of fires that ravaged the northern and central sections of the city resulting in a steady exodus of the city's residents to the Greek centers of government in exile. The sack of Constantinople by Latin crusaders in 1204 was an economic catastrophe. Due to the financial crisis, the state could only pay silver marks ( pounds of pure silver) out of silver marks (equivalent to 800,000 "hyperpyra") to the Crusaders in 1204. The official tally of plunder from Constantinople was about silver marks, the equivalent of about 3,600,000 "hyperpyra" or 50,000 pounds/22.5 tonnes of gold. The impoverished Latin emperors melted down statues for coin, while the Venetians exported their declining profits, along with choice relics and architecture spolia for their churches. In 1237, Latin Emperor Baldwin II pawned the Crown of Thorns to a Venetian merchant for gold coins.