♥  Model of the St. Peter's Cathedral by Michelangelo. Michelangelo had several models made of the St. Peter dome during the time he worked on it. Discovered in an attic and newly restored, these models are now a main attraction at the Vatican Museum. Architects over the centuries have made models to check details in 3D and help clients understand dimensional perspectives. Many architects of renown also collected models, not only for their exquisite workmanship but also for their value as décor in homes and especially offices.