Sir Christopher Wren was an English architect, astronomer, and mathematician, best known for designing many notable buildings in London. Born in 1632, he played a significant role in the reconstruction of the city after the Great Fire of 1666. His most famous work is St. Paul's Cathedral, which features a stunning dome and intricate details. In addition to his architectural achievements, Wren was a prominent scientist and a founding member of the Royal Society. He contributed to various fields, including astronomy and physics, and was known for his innovative ideas. Wren's legacy continues to influence architecture and design today.