Why did Constantine move the capitol?

Constantine I moved the capital of the eastern part of the empire from Nicodemia to nearby Byzantium, which was renamed Constantinople. Nicomedia was associated with Diocletian, the emperor which established this city as capital and who unleashed the Great Persecution of Christians which had been very unpopular. Moreover, Constantine supported Christianity. When Constantine I became sole emperor, he wanted to built a new capital to disentangle the capital of the east from Diocletian's past, for personal glory and for his penchant for Propaganda. His new capital was a mark of the new dawn his rule would bring about.