Map Hotels Restaurants The history of Tui dates back many, many centuries, as befits its privileged location on a hill on the banks of the River Miño and on the border with Portugal. These circumstances had a great bearing on the planning of its ancient streets, which harmoniously wind their way down from the cathedral to the river.   Frequent raids by warriors occasioned the conversion of the cathedral into a fortress, bristling with battlements. Work on it began in the twelfth century, initially in a Romanesque style with allusions to the Cathedral of Santiago, later to be superseded by a French-inspired, early-Gothic style which receives its most complete expression in the facade. In the southern part, an extensive Gothic cloister was built The ancient church of Santo Domingo is a must on any tourist’s itinerary as is the modern church of San Francisco. The Claretian convent, las "Encerradas", and the Capilla de la Misericordia are also worth paying a visit to. Portuguese Baroque makes its influence felt in the church of San Telmo, the patron saint of the city.