In exchange for an alliance, Alexios I sent gold coins to Emperor Henry IV. The wealth of the empire under the Comnenians can be seen by how Emperor Manuel I was able to ransom some Latin prisoners from the Muslims for dinars, then dinars for Bohemond III in 1165, dinars for Raynald of Châtillon, and dinars for Baldwin of Ibelin in 1180. When Manuel became emperor he ordered 2 gold coins to be given to every householder in Constantinople and 200 pounds of gold (including 200 silver coins annually) to be given to the Eastern Orthodox Church. When his niece Theodora married King Baldwin III of Jerusalem in 1157, Manuel gave her a dowry of gold coins, gold coins for marriage expenses, and presents (jewels and silk garments) which were worth gold coins total. The expense of Manuel's involvement in Italy must have cost the treasury a great deal (probably more than 2,160,000 "hyperpyra" or pounds of gold). Then he also promised to pay pounds of gold to the Pope and the Curia. During his reign, Manuel bought a very rich jewel (for silver marks) which was used during the coronation of the Latin Emperor Baldwin I. The main source of the state's wealth in the 12th century was the "kommerkion", a customs duty levied at Constantinople on all imports and exports, which was stated to have collected "hyperpyra" each day. This, combined with other sources of income, meant the empire's annual revenue was at 5,600,000 "hyperpyra" in 1150. Under the Komnenian emperors, many exemptions of trade duties were given to the Italian traders, which meant the loss of about 50,000 "hyperpyra" annually. A Venetian embassy visited Constantinople in 1184 and an agreement was reached that compensation of 1,500 pounds of gold (or 108,000 "hyperpyra") would be paid for the losses incurred in 1171. By the end of Manuel I's reign the amount of money used to maintain the Komnenian imperial family is said to be able to maintain an army of 100,000 men.