On April 15, 1865, the day President Lincoln died, a group of Springfield citizens formed the National Lincoln Monument Association and spearheaded a drive for funds to construct a memorial or tomb. Upon arrival of the funeral train on May 3, Lincoln lay in state in the Illinois State Capitol for one night. After funeral and burial services the next day, his coffin was placed in a receiving vault at Oak Ridge Cemetery, the site Mrs. Lincoln requested for burial. In December, her husband's remains were removed to a temporary vault not far from the proposed memorial site. The location of the temporary vault is today marked with a small granite marker on the hill behind the current tomb. In 1871, three years after laborers had begun constructing the tomb, the body of Lincoln and those of the three youngest of his sons were placed in crypts in the unfinished structure.