Who began preaching the Roman Catholic faith in the Baltics?

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It was here where in around 1180, the Augustinian monk Meinhard (Saint Meinhard) began to preach the Roman Catholic faith in the Liv lands. This is the starting point of both the Baltic crusades and the incorporation of the Baltic region into the Western European cultural space. The medieval Ikšķile Church was built in 1184 next to a Liv village, and it was the first stone building in the Baltic region. After Meinhard was appointed Bishop of Livonia (1186), it became his cathedral. The church was significantly rebuilt during the first half of the 13th century and in 1879-1881. Destroyed during World War I. Ikšķile stone castle was built in 1185 and destroyed in the 16th century. During the construction of the Riga hydroelectric power plant reservoir in 1975-1976, an artificial island was made around the castle and church ruins; in 1999, the island was named after St. Meinhard.