Since 1921 the intent was to place a superstructure on top of the Tomb .
It was not until July 3 , 1926 , that Congress authorized the completion of the Tomb and the expenditure of $50,000 ( with a completed cost of $48,000 ) .
Since 1921 the intent was to place a superstructure on top of the Tomb , but it was not until July 3 , 1926 , that Congress authorized the completion of the Tomb and the expenditure of $50,000 ( with a completed cost of $48,000 ) .