Santo Tirso (Portuguese pronunciation: (listen)) is a city and municipality located in the north of Porto Metropolitan Area, 25 km from central Porto, Portugal. In the region, the Ave Valley, there is a large center of textile industry. The population in 2011 was 71,530, in an area of 136.60 km². Another important center in the municipality is Aves. The Santo Tirso Monastery built in 978 is a point of interest. The History of Santo Tirso is tied to its benedictine monastery. The town grew around it and, from 978 until 1834, it was a "couto" – a neutral area that belonged to the clergy. Known initially as Santo Tirso de Riba de Ave, this city has been the capital of a municipality at least since 1833. Its composition changed throughout the years, especially in 1998, when the nearby city of Trofa created its own municipality, taking some of Santo Tirso's towns with it. More information...
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