Historical and functional
Visitors to the Alexandria Slave Pen in the 1830's often commented on the whitewashed walls. Whitewash was cheap and helped disinfect. Today, it helps keep the bricks from being dusty, while not traping moisture.

Visitors to the Alexandria Slave Pen in the 1830's often commented on the whitewashed walls. Whitewash was cheap and helped disinfect. Today, it helps keep the bricks from being dusty, while not traping moisture.