St Mark's was a major focus of Ruskin 's work on his numerous trips to Venice. The outcomes from this work did much to change received perceptions of the building in England, which saw it as ugly ( Works, 8.206; 9.55; 10.97,117). He praises its sculptured ornament in 'The Lamp of Power' ( Works, 8.119-20) and 'The Lamp of Life' ( Works, 8.199-200). In 1849-50 and 1850-51 he made a detailed study of the building's west front, recorded in measurements, diagrams, sketches and descriptions which are cross-referenced to a series of large scale worksheets. He also made daguerrotypes and detailed renderings of the building. These contributed to The Stones of Venice (1851-53) and the folio, Examples of the Architecture of Venice (1851). He re-visited his work at St Mark's in 1876-77, the result being St Mark's Rest (1877-84) a work which in part focuses on the building's mosaic decoration. In the 1880s he campaigned against the building's restoration (see Ruskin and Venice).