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. 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.
The monument is inscribed on one side with—
On another are two inscriptions from men commemorated on the monument—
"I have devoted myself to the cause of The People. It is a good cause—it shall ultimately prevail—it shall finally triumph. Speech of Thomas Muir in the Court of Judiciary on the 30th August 1793.
I know that what has been done these two days will be Re-Judged. Speech of William Skirving in the Court of Judiciary on the 7th January, 1794."
In 1837 the Radical politician Joseph Hume MP initiated a plan to erect a monument to the five men. Hume chaired a London-based committee to raise public subscriptions in support of the monument and settled on its location being in Edinburgh. In that year the publisher William Tait of Edinburgh wrote on their behalf to the Lord Provost of Edinburgh requesting that land be made available on Calton Hill for this end.
The foundation stone was laid by Hume on 21 August 1844, with 3,000 people gathered for the occasion. The Old Calton Burial Ground, and other parts of Calton Hill, are home to a number of other monuments and memorials. The monument was designed by Thomas Hamilton, who is also responsible for a number of other structures on Calton Hill including the former Royal High School building and the memorial to Robert Burns.
In February 1852 Hume initiated the construction of a second Monument at Nunhead Cemetery in London. This monument stands at 33 ft (10 m) high.
The five men commemorated—two from Scotland and three from England—were imprisoned for campaigning for parliamentary reform under the influence of the ideals of the French Revolution. Specifically, their support of Palmer's 1793 address that advocated for universal suffrage and annual parliaments was considered incendiary. The five were accused of sedition in a series of trials in 1793 and 1794, and sentenced to terms of penal transportation in the British colony of New South Wales. All but Gerrald travelled together on the convict transport Surprize; Gerrald left later on the transport Sovereign.