Marc Isambard Brunel was a French engineer and inventor, born on April 25, 1769, in Hacqueville, France. He is best known for his work on the Thames Tunnel in London, which was the first underwater tunnel built in the world. Brunel's innovative techniques and designs significantly advanced civil engineering during the 19th century. Brunel moved to England in 1799, where he became a prominent figure in engineering. He collaborated with his son, Isambard Kingdom Brunel, on various projects, including bridges and railways. His contributions laid the groundwork for modern engineering practices and infrastructure development.