The Seven Lamps of Architecture : Lectures on Architecture and Painting, The Study of Architecture by John Ruskin, first published in May 1849. The 'lamps' of the title are Ruskin's principles of architecture, which he later enlarged upon in the three-volume The Stones of Venice.
Chapters include: The Lamp of Sacrifice The Lamp of Truth The Lamp of Power The Lamp of Beauty The Lamp of Life The Lamp of Memory The Lamp of Obedience