Complex sentence: Following the construction of the Cathedral in 1727, it became the site of some of the city's grandest mansions, now home to the Museo del Arte Colonial (Colonial Art Museum) and a number of restaurants.
Split into simpler sentences: Following the construction of the Cathedral in 1727, it became the site of some of the city's grandest mansions. In addition to the cathedral, it is the site of the Museo del Arte Colonial (Colonial Art Museum) and a number of restaurants.