The Latin clerics wanted to compel the Orthodox population of Constantinople to adopt the Catholic liturgy and to pay the tithe, but they resisted. Pope InnocentIII sent Cardinal Pelagius as his legate to Constantinople in 1213 to discipline the Orthodox population for their resistance. Pelagius closed Orthodox churches and ordered the imprisonment of the resistant monks, but the Greeks did not give in and many of them fled to Nicaea. The Greek aristocrats approached Emperor Henry, asking him either to stop the persecution of Orthodoxy or to allow them to move to Nicaea. Henry capitulated and ordered the re-opening of Orthodox churches in Constantinople. Pelagius entered into negotiations with Theodore about a possible Church union at Heraclea Pontica, but their discussions proved inconclusive.