Die Kathedrale der Heiligen Maria in der spanischen Hafenstadt Palma, der Hauptstadt der Baleareninsel Mallorca, ist die Bischofskirche des Bistums Mallorca. Sie wird im Volksmund oft einfach La Seu genannt, der katalanische Ausdruck bedeutet „der Bischofssitz“.

The Cathedral of Santa Maria of Palma, more commonly referred to as La Seu, is a Gothic Roman Catholic cathedral located in Palma, Majorca, Spain, built on the site of a pre-existing Arab mosque. It is 121 metres long, 55 metres wide and its nave is 44 metres tall. Designed in the Catalan Gothic style but with Northern European influences, it was begun by King James I of Aragon in 1229 but finished only in 1601. It sits within the old city of Palma atop the former citadel of the Roman city, between the Royal Palace of La Almudaina and the episcopal palace. It also overlooks the Parc de la Mar and the Mediterranean Sea.

In 1901, fifty years after a restoration of the cathedral had started, Antoni Gaudí was invited to take over the project. While some of his ideas were adopted – moving the choir stalls from the middle nave to be closer to the altar, as well as a large canopy – Gaudí abandoned his work in 1914 after an argument with the contractor. The planned changes were essentially cosmetic rather than structural, and the project was cancelled soon after.