The Political Martyrs Monument, located in the Old Calton Burial Ground on Calton Hill, Edinburgh, commemorates five political reformists from the late 18th and early 19th centuries. Designed by Thomas Hamilton and erected in 1844, it is a 90 ft (27 m) tall obelisk on a square-plan base plinth, all constructed in ashlar sandstone blocks. As part of the Burial Ground it is Category A listed.[1]