The cathedral is dedicated to St John the Baptist (St Jean-Baptiste) and St Stephen (St Etienne) and has the title of primatiale because the Bishop of Lyon has the honorary title of Primat des Gaules. Built between 1180 and 1480, it is mostly of Gothic style with Romanesque elements; the oldest parts are the chancel and the lateral chapels, and as one goes towards the façade, the style becomes more and more Gothic. The cathedral hosts a spectacular astronomical clock built in the 14th century but modified later. It is especially worth seeing when the bells ring, daily on the hour from 12:00-16:00. Over the main door, the rose window, known as the "Lamb rose window", is an admirable work of art depicting the life of St Stephen and St John the Baptist.