The period was also infamous for papal corruption, with many Popes fathering children, and engaging in nepotism and simony. The corruption of the Popes and the huge expenses for their building projects led, in part, to the Reformation and, in turn, the Counter-Reformation. Under extravagant and rich popes, Rome was transformed into a centre of art, poetry, music, literature, education and culture. Rome became able to compete with other major European cities of the time in terms of wealth, grandeur, the arts, learning and architecture.