Who burned Richmond during the civil war?

As the Union army advanced on Richmond, Confederate Lt. Gen. Richard S. Ewell was ordered to destroy the city's tobacco, cotton, and food, in order to prevent it from falling into enemy hands. He packed the supplies into warehouses and set them on fire. Unfortunately, due to the chaos in the city, the fire brigade was unable to contain the blaze and it spread to the rest of the city. The fire was finally extinguished when the Union army arrived. They formed a bucket brigade to put out the fire and tore down nearby buildings to keep it from spreading.