There's a passage way that makes a semi circle behind the altar area in the main cathedral at the Basilica of St. Anne de Beaupre. There are small chapels all along that passage way and this gate connects that passageway to the main altar. If you were to go through this gate and around the hanging tapestry you'd be at the altar looking at the pews.
I don't know if it's anything noteworthy but I thought it looked pretty cool.