The Church of St. Blaise (St. Blaise/Sv. Vlaho is a patron saint of the city) is situated North of Pustijerna in Dubrovnik. It was built in 972 after the saint miraculously saved the city. In the 12th century a new edifice was built (on the grounds of previous one) dedicated to St. Mary, on the request of its ktetor King Richard of England and a first mass was held in 1197.
Under the floor of today's baroque cathedral the remains of the early medieval Church of St. Blaise were found, preserved to a height of about 2 m. Even though researchers disagree over the original plan of the Church it was probably a three nave basilica with a dome, that has been expanded over time. Three phases of construction of the early medieval Church have been established, in 972, around 1020 and in 1060. Later, in 1171 a new Church dedicated to St. Mary was built.
Also, remains of stone furnishings and sculpture have been found, as well as fragments of fresco decoration.