Complex sentence: The original 1856 building, which cost £344 to build, proved inadequate within a short time, and in 1861 it was taken down and the chapel rebuilt and re-opened a year later.
Split into simpler sentences: The original 1856 building, which cost £344 to build, proved inadequate within a short time. In 1861 it was taken down and the chapel rebuilt and re-opened a year later.