SJ Mack
Google
What a wonderful and historic church.  The cool, dark interior is dominated by vaulted ceilings and a magnificent Baroque altarpiece of carved, guilded wood that takes up the entire height of the back wall of the apse, and the two wings that flank it.
The wooden galleries - reserved for men - are typical of the Basque Country.
The building is steeped in history with Louis XIV and María Teresa, daughter of King Philip IV of Spain, being married in 1660 (while the church was still under construction).
Visiting is an absolute must if you are in the area.