With the restoration of firm central government, the empire became fabulously wealthy. The population was rising (estimates for Constantinople in the 12th century vary from some 100,000 to 500,000), and towns and cities across the realm flourished. Meanwhile, the volume of money in circulation dramatically increased. This was reflected in Constantinople by the construction of the Blachernae palace, the creation of brilliant new works of art, and general prosperity at this time: an increase in trade, made possible by the growth of the Italian city-states, may have helped the growth of the economy. It is certain that the Venetians and others were active traders in Constantinople, making a living out of shipping goods between the Crusader Kingdoms of Outremer and the West, while also trading extensively with Byzantium and Egypt. The Venetians had factories on the north side of the Golden Horn, and large numbers of westerners were present in the city throughout the 12th century. Toward the end of Manuel I Komnenos's reign, the number of foreigners in the city reached about 60,000–80,000 people out of a total population of about 400,000 people. In 1171, Constantinople also contained a small community of 2,500 Jews. In 1182, most Latin (Western European) inhabitants of Constantinople were massacred.