Lansdown boasts one of our earliest battlefield monuments although, unlike most, it commemorates the death of a single individual rather than marking the battle as a whole. The monument, which is in the care of English Heritage, was erected in 1720 for Lord Lansdown in memory of his grandfather, Sir Bevill Grenvile, a Cornish royalist commander. The inscription on the monument gives a different spelling of his name because the family name was changed to Granville later in the 17th century. The monument probably lies close to where Grenvile fell. As this occurred at the turning point of the battle and at the heart of the fighting, so the monument almost certainly marks the centre of the main action.  English Heritage completed conservation work on the monument in 2019 following a report from the Battlefields Trust that the panel of the monument was at risk of falling-off.

In 2003 a series of three modern marker stones, carved with designs derived from contemporary 17th century publications, were also been added. Each is placed alongside the interpretation panels on the battlefield trail which follows the scarp edge.