Complex sentence: Artists often worked in more than one medium; van Eyck and Petrus Christus are both thought to have contributed to manuscripts, while van der Weyden designed tapestries, though few survive.
Split into simpler sentences: Artists often worked in more than one medium; van Eyck and Petrus Christus are both thought to have contributed to manuscripts. Van der Weyden designed tapestries, though few survive.