An increase in membership over the last 150 years saw a corresponding increase in building activity. The Hall was rebuilt in 1875–1876 to designs by Alfred Waterhouse after he had declared the medieval Hall unsafe. As well as the Hall, Waterhouse designed a new range of rooms, Red Buildings (1871–1872), in French Renaissance style, designed a new Master's Lodge on the site of Paschal Yard (1873, later to become N staircase), pulled down the old Lodge and the south range of Old Court to open a vista to the chapel, and finally designed a new Library (1877–1878) in the continental Gothic style. The construction of the new library was undertaken by Rattee and Kett.