Complex sentence: The industrialisation of Rotterdam, Amsterdam and other regions of the Netherlands affected landscapes that had remained untouched for centuries, many of which quickly disappeared, and with them the inspiration for earlier forms of landscape and genre painting.
Split into simpler sentences: The industrialisation of Rotterdam, Amsterdam and other regions of the Netherlands affected landscapes that had remained untouched for centuries. Many of these landscapes disappeared, and with them, the inspiration for earlier landscape and genre painting.