The Cattedrale di Tortona, also known as the Cathedral of Tortona, is a Roman Catholic cathedral located in the city of Tortona, Italy. It serves as the seat of the Bishop of Tortona and is dedicated to the Assumption of the Virgin Mary. The cathedral features a blend of architectural styles, primarily Romanesque and Baroque, reflecting its long history and various renovations. Construction of the cathedral began in the 11th century, and it was consecrated in 1157. Notable elements include its impressive façade, beautiful frescoes, and a striking bell tower. The cathedral is an important religious and cultural landmark in the region, attracting both pilgrims and tourists.