It is a diocesan seat since 1968.

The town had been an diocesan seat of the Nevrokop Orthodox diocese, but now it is moved to Blagoevgrad, but without changing the name.

Pius himself was active, during those years, by creating new diocesan seats and appointing bishops to numerous dioceses, which had been unoccupied for years.

Robert de Bedford was elected as successor in 1213 or 1214 but he had never the opportunity to take possession of the diocesan seat.

The current Cathedral of Cortona became the diocesan seat only in 1507.

Alghero was designated as a diocesan seat in 1503 but construction work on the cathedral did not begin until the 1530s.

Each have had a diocesan seat in Lviv since the 16th century.

Since the 15th century, the diocesan seat has been the cathedral of Notre-Dame de Strasbourg.

They were attached to churches and would often have their own chapels, including some of the most important buildings in Olinda's diocesan seat of Recife.

Its gradual decline began in 1138, when the diocesan seat was moved to Grosseto.