Complex sentence: In 1828-1829 Leopold was involved romantically during several months with the actress Caroline Bauer, who enjoyed a striking resemblance with Charlotte and who was a cousin of his advisor baron Christian Friedrich von Stockmar.
Split into simpler sentences: In 1828-1829 Leopold was involved romantically during several months with the actress Caroline Bauer, who enjoyed a striking resemblance with Charlotte. Caroline was a cousin of his advisor Baron Christian Friedrich von Stockmar.