The Sant Pere church complex sits in Vallparadís Park, just east of Terrassa's old town. It consists of three separate buildings: Sant Pere itself (early Romanesque, with extraordinary 10th-century wall paintings of the apostles); Sant Miquel (a baptistery, the oldest of the three, dating to the 6th–7th century, with its eight-columned interior intact); and Santa Maria (a 12th-century Romanesque structure with rare apsidal frescoes of the Murder of Thomas Becket painted soon after his canonisation).
Together they form one of the most important pre-Romanesque and Romanesque ensembles in Catalonia, and arguably in Europe. The wall paintings in particular are nearly unique survivals — most early medieval frescoes have been destroyed or whitewashed. The complex is owned by the city and open daily; allow at least 90 minutes. The interpretation room has scale models and English-language information.