Saint-Jean-de-Montmartre, Gothic Revival church in Montmartre, Paris, France.

Saint-Jean-de-Montmartre is a Roman Catholic parish church at 19 Rue des Abbesses in the 18th arrondissement of Paris. Its red-brick facade, with grey stone and cast-iron detailing, has a central tower topped by a lobed arch with tracery, above a pointed-arch window with red and blue glazing and a rounded entry arch with mosaic panels. Inside, grey reinforced-concrete ribs and piers form pointed arcades above lower aisles, and a herringbone floor of dark wooden blocks fills the nave.

Father Sobbeaux commissioned the church to serve the growing population at the foot of Montmartre, far from Saint-Pierre on the hill. Anatole de Baudot designed it using Paul Cottancin's 1892 patent for reinforced cement. In 1898 a lawsuit halted work and a demolition order followed; Baudot and Sobbeaux built full-scale column models in the garden to prove stability, and work resumed in 1902. The church was consecrated in 1904.

The church is nicknamed "Saint-Jean-of-the-Bricks" for its red brick facade, and its exterior and interior decoration follows the writings of St John: the Fourth Gospel and the Apocalypse. The 48 small triangular windows along the nave illustrate the Litanies of the Virgin; the first carries a text recording that they were offered by friends of the parish during the 1914-1918 war, drawn by Pascal Blanchard and made by Jac Galland.

The church sits at the foot of Montmartre hill and is open daily, with regular Catholic services held throughout the week. You can move through the interior spaces at your own pace and explore the details.

The nickname "Saint-Jean-of-the-Bricks" comes from the red brick facing, which also carried load and insulated the interior. Behind it, the real structure is reinforced cement: walls just 7 cm thick and columns 50 cm across rising 25 m, the dimensions that triggered the 1898 lawsuit and demolition order.