Many Dutch (and Flemish) painters worked abroad or exported their work; printmaking was also an important export market, by which Rembrandt became known across Europe. The Dutch Gift to Charles II of England was a diplomatic gift which included four contemporary Dutch paintings. English painting was heavily reliant on Dutch painters, with Sir Peter Lely followed by Sir Godfrey Kneller, developing the English portrait style established by the Flemish Anthony van Dyck before the English Civil War. The marine painters van der Velde, father and son, were among several artists who left Holland at the French invasion of 1672, which brought a collapse in the art market. They also moved to London, and the beginnings of English landscape painting were established by several less distinguished Dutch painters, such as Hendrick Danckerts.