The Baltimore Basilica was the first roman catholic cathedral built in the United States. It was built by Benjamin Henry Latrobe and was built between 1806 and 1863 in Baltimore, Maryland. It held tons of events throughout the 19th century, many of these meetings helped shape the Catholic Church in the United States. In 1969 the building was declared a National Historic Landmark. I think that this building is incredibly beautiful, especially the dome. In 2006 there was a 3 year $34 Million restoration project that brought some of the technology up to date.