In the heart of Trastevere, an area that more than any other maintains the spirit of old Rome, there lies the Church of Santa Maria in Cappella. The Church was built in the twelfth century by reusing marble, columns, and materials from Imperial Rome. A treasure trove of art, it has a precious altar made from a preexisting ancient Roman one, relics of Saints, among which St. Peter the Apostle, works of art from Ancient to Medieval Rome and pieces of Bernini and Borromini. It was here that Santa Francesca Romana, a beloved saint of Rome, attended the needy and the sick in the fifteenth century. Along with the museum and The Secret Garden of Donna Olimpia, just recently opened to the public, the Church is one of the most interesting historical sites of the ancient City, where even today archaeological excavations continue to bring to light interesting artifacts. Donna Olimpia, a powerful member of the Pamphilij family, created in the seventeenth century "The Garden of Delights of Donna Olimpia" also known as "The Secret Garden" or "The Baths of Donna Olimpia", in the area that encloses the Church of Santa Maria in Cappella and the old Hospital, right downstream to the Tiber Island, where in ancient times there was the most important river port of Rome: the Port of Ripa Grande. The large Garden, in the middle of which is the Fountain of the Snail by Gian Lorenzo Bernini, has an incredible variety of flower and fruit trees, as well as rare floral and aromatic plants. Overlooking the Tiber river, Donna Olimpia also built a marvelous Belvedere with a clubhouse: these structures have been shown in paintings and prints, among which the famous scenes of Gaspar Van Wittel (also known as Vanvitelli).