The chapel of Merton College is a beautiful historical monument, south of High Street in Oxford's medieval center. The college, part of Oxford University, was founded in 1260 and with it the first church. It quickly fell into ruin and in the fourteenth century they began to build another chapel. It has very fine stained glass windows and you can go inside every day in the afternoon, though on Sunday there's a restricted schedule. The bell tower dates from 1450, the chapel replaced the parish of St. John and remained a parish until 1891. There's an interior entrance for the school's students and an outside entrance for inhabitants of Oxford.