In the Da Vinci code..................a niece of someone imp. in the book catches her uncle is some sacred feminine ceremony sacrificing some pig.................for the consecration of the us capital.........and the laying of the 1st stone..............a 500 lb ox was butchered...........

The plate was handed to Washington, who stepped down into the foundation trench, laid the plate on the ground, and lowered the cornerstone onto it. With the president were Joseph Clark and three "worshipful masters" bearing the corn, wine, and oil used to consecrate the stone. Chanting accompanied Washington’s ascent from the trench. Clark gave a speech punctuated by numerous volleys from the artillery. Following the formal exercises, a 500 pound ox was barbequed and those in attendance “generally partook, with every abundance of other recreation.” By dark, the festivities had ended.

A painting of this ceremony appears in the Cox Corridors of the House Wing of the U.S. Capitol Building.