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Established in 1845, the Fábrica de Fiação e Tecidos do Rio Vizela (spinning and weaving mill) was the country’s first spinning mill. It grew to become one of the region’s most important and thriving companies, employing over three thousand people at its peak. It operated across the entire textile sector, including spinning, weaving, dyeing, finishing and garment manufacturing. Regarded as the heart of the Vale do Ave textile industry and the main driving force behind the economic and social development of the municipality of Santo Tirso, it was the key factor in bringing the railway to this area. Source: Santo Tirso City Council 15:00-17:00 – Printing workshop - Free workshop. Booking required at least 48 hours in advance via email at cultura@cm-stirso.pt or by telephone on +351 914 382 823 17:00-18:00 – Guided visit to the yarn and fabric mill - The tour is free, but booking is required at least 48 hours in advance by emailing cultura@cm-stirso.pt or by telephone on +351 914 382 823 Free admission The activities that take place alongside the concerts are the responsibility of the respective municipalities co-promoting Sounds in Heritage Sites. Sounds in Heritage Sites’ full programme at https://iporto.amp.pt/en/eventos/sounds-in-heritage-sites-2026/