Titular bishops of Coimbra continued the succession under the Islamic conquest, one of whom witnessed the consecration of the church of Santiago de Compostela in 876.

[5] In the midst of the difficulties of restoring the Church in Portugal in the wake of the request of the country from the Arabs, Bishop Mauricio Burdino applied to Pope Paschal II and obtained a bull Apostolicae Sedis (24 March 1101),[6] assuring him of the possession of the old territory of his diocese, including parts which were once part of the diocese as they are reconquered from the Moors and the Arabs.

[7] From 1139 Coimbra was the capital of the kingdom of Portugal and a principal beneficiary of the generosity of its kings, until the seat of government was moved to Lisbon in 1260.

One bishop, Miguel da Anunciação, spent eight years in prison for defying the efforts of the government to modernize the educational system of Portugal's university.

[10] The Old Cathedral of Coimbra, built in the first half of the 12th century, partly at the expense of Bishop Miguel and his chapter, is a remarkable monument of Romanesque architecture.

The cathedral was administered by a chapter, whose eight dignities (not dignitaries) included: the dean, the cantor, the scholasticus, the treasurer, and the three archdeacons (Coimbra, Sena).