This live oak, one of the largest in the United States, is estimated to be almost 500 years old. It was already a large tree in 1800 when the property was donated to the Catholic Church. Its age is based on average sizes of trees of known age, a tree recorded in 1812 as a surveyor's section corner marker, and growth rate calculated from cores removed from the tree. The trunk measures nine feet two inches in diameter and twenty eight feet nine inches in circumference. It stands 126 feet high with an average spread of 138 feet. The large limb extending in a southeasterly direction has been computed by engineering consultants to weigh 72 tons.