Birmingham's industrial development was triggered by discussions at the Lunar Society of Birmingham at Soho House, Boulton's house, and products were carried along the BCN Main Line canal. Soho Manufactory was the first man-made-powered factory in world. Chance Brothers of Smethwick built the glass for The Crystal Palace in 1851. Smethwick Engine, now at Thinktank, Birmingham Science Museum, is the oldest working steam engine, made in 1779, and is the oldest working engine in the world. Smethwick was a main centre for making lighthouse lanterns.