This is the primary Nave in the Basilica de Guadalupe. I am surprised the floor is black. With the emphasis on symbology where God is all things white and the Devil is dark, I would expect the floor to be bright marble. The building has recently been restored and made safe for visitors. The soft ground beneath is giving way, the building is sinking. It will need continual intervention by man to keep it upright. One day, though, entropy will win. It always does.