Complex sentence: Sometime before 1807 the first "town plans" were drawn up on behalf of Sir Laurence Palk, after a Grand Tour of Europe, Palk brought back from Italy architectural ideas which he incorporated into his villa designs.
Split into simpler sentences: Sometime before 1807 the first "town plans" were drawn up on behalf of Sir Laurence Palk. After a Grand Tour of Europe, Palk brought back from Italy architectural ideas which he incorporated into his villa designs.