While I was in Marinduque, I made a side trip to one of the oldest religious structures of the island.
Boac Cathedral – Located at the Boac Poblacion, this cathedral was constructed in the year 1792. The latter was also the shrine of the miraculous image of the Biglang-awa. The doors of the cathedral really caught my attention. The door has the 4 Evangelists carved on it. When I tried pushing a door, it was really heavy. The exterior is made of stone and bricks.
There's a separate altar for the miraculous image of Mahal na Birhen ng Biglang-awa (Our Lady of Prompt Succour). When you get out of the chuch, there's a small shrine located at the left (facing the facade). When you enter the small shrine, you can see the image enclosed in its marble altar.