John Ruskin was an English art critic and social thinker from 1819-1900 who had a significant influence on architecture in Victorian England. He championed Gothic architecture and medieval styles over classical styles, helping spark the Gothic Revival. Ruskin believed that architecture should incorporate handcrafted details and reflect local culture and history. He articulated seven principles or "lamps" of architecture - sacrifice, truth, power, beauty, life, memory, and obedience. Ruskin rejected mass production and the loss of craftsmanship, instead valuing individual artistry. His writings shaped aesthetic tastes and values in Britain by linking art to morality and spiritual health.