From the 1650s the "classical phase" began, retaining the atmospheric quality, but with more expressive compositions and stronger contrasts of light and colour. Compositions are often anchored by a single "heroic tree", windmill or tower, or ship in marine works. The leading artist was Jacob van Ruisdael (1628–1682), who produced a great quantity and variety of work, using every typical Dutch subject except the Italianate landscape (below); instead he produced "Nordic" landscapes of dark and dramatic mountain pine forests with rushing torrents and waterfalls.