This is Turner’s first diagram in his survey of historical methods for a cube. The technique was proposed by Jean Pélerin, a French cleric and scholar, who wrote under the name ‘Viator’. His book De Artificiali Perspectiva 1505 was the first ‘how-to’ book on published in Europe.
The basis of Pélerin’s construction was the ‘distance point’ method. This required a principal vanishing point and two distance points at either side to find the shape.
Gallery label, September 2004