Later popes started projects to save the building from falling down. They took out the many plants which had overgrown the building and were causing more damage. The facade was made stronger with triangular brick wedges in 1807 and 1827. The inside was repaired in 1831, 1846 and in the 1930s. The underground area was partly dug out in 1810–1814 and 1874. This digging was finished by Benito Mussolini in the 1930s.'