The Women in Military Service for America Memorial (WIMSA) is a memorial established by the U.S. federal government which honors women who have served in the United States Armed Forces. The memorial is located at the western end of Memorial Avenue at the entrance to Arlington National Cemetery in Arlington County, Virginia, in the United States. The structure in which the memorial is housed was originally known as the Hemicycle, and built in 1932 to be a ceremonial entrance to the cemetery.