The Our Lady of the Immaculate Conception Cathedral [1] (Portuguese: Sé Catedral de Nossa Senhora da Conceição) also called Leiria Cathedral It is a Catholic church built in the center of the city of Leiria,[2] Portugal.

The first stone was laid on August 1, 1550, becoming one of the most important buildings of the late Renaissance in Portugal.

The cathedral was partially destroyed in the 1755 Lisbon earthquake, so reforms that gave the current robust appearance were made.

Of the original construction, the front facade, just 3 remaining panels at the entrance, two of which correspond to the central or higher.

The building was also damaged during the Peninsular War in 1811, French troops set fire, destroying much of its interior decoration.