Complex sentence: In 1803, he appointed Benjamin Henry Latrobe as surveyor of public building in the United States, and Latrobe designed a number of important public buildings in Washington, D.C. and Philadelphia, including work on the United States Capitol and the Bank of Pennsylvania.
Split into simpler sentences: In 1803, he appointed Benjamin Henry Latrobe as surveyor of public building in the United States. Latrobe went on to design a number of important public buildings in Washington, D.C., and Philadelphia, including work on the United States Capitol and the Bank of Pennsylvania.