Viseu Cathedral is the Catholic bishopric seat of the city of Viseu, in Portugal. The church started being built in the 12th century and is the most important historical monument of the town. It is currently a mix of architectural styles, specially from the Manueline, Renaissance and Mannerist periods.
The cathedral is located on a large and harmonious square, beside the old Bishop's Palace (now the Grão Vasco Museum) and in front of the Misericórdia Church of Viseu.