In the Yvelines region, in the heart of the town of Mantes-La-Jolie, the Collégiale Notre-Dame de Mantes is one of the treasures of the Île-de-France region. This impressive church, listed as a Monument Historique, is also nicknamed "Notre-Dame de Paris's little sister".
If you're looking for a great way to kick off the year with some active fun in the Yvelines, now's the perfect time to sign up for the Trail Urbain de la Galette, making its 7th edition in Mantes-la-Jolie this Saturday, January 10, 2026. Meet us on the forecourt of the Notre-Dame Collegiate Church from 2 p.m. to enjoy the activities before the race starts at 6:30 p.m.
