Complex sentence: A number of schools of painting developed in northern Europe in the late-14th and early-15th centuries as the domination of Gothic art gave away to the International Gothic era, which in turn was in decline by the end of the 15th century.
Split into simpler sentences: A number of schools of painting developed in northern Europe in the late-14th and early-15th centuries. The domination of Gothic art gave away to the International Gothic era, which in turn was in decline by the end of the 15th century.