There were many dynasties of artists, and many married the daughters of their masters or other artists. Many artists came from well-off families, who paid fees for their apprenticeships, and they often married into property. Rembrandt and Jan Steen were both enrolled at the University of Leiden for a while. Several cities had distinct styles and specialities by subject, but Amsterdam was the largest artistic centre, because of its great wealth. Cities such as Haarlem and Utrecht were more important in the first half of the century, with Leiden and other cities emerging after 1648, and above all Amsterdam, which increasingly drew to it artists from the rest of the Netherlands, as well as Flanders and Germany.