Unveiled by the Dean of St Paul’s Cathedral on September 2023, the Portland Wren’s Stone is a memory stone that celebrates the life and architectural achievements of Sir Christopher Wren in his tercentenary year, and the skills of the quarrymen that shaped the older network of quarry landscapes which have become Wren’s environmental legacy.

Designed and carved by the Portland Sculpture & Quarry Trust, the stone includes a Gnomon (the part of a sundial which creates a shadow) designed at 1:500 scale of the dome of St Paul’s Cathedral; aligned to solar noon on midsummers day, when Wren placed the first stone to mark the centre of the dome. 

The Gnomon casts a shadow across Wren’s 12 existing churches in order of their distance from St Pauls Cathedral, and marks the start of a walk-through Portland's heritage quarries to ‘Wrens Way’.

Born in Dorset, Sir Christopher Wren was an English architect, astronomer, mathematician and physicist who was one of the most acclaimed architects in the history of England.