Input (grade 10): The façade was reinforced with triangular brick wedges in 1807 and 1827, and the interior was repaired in 1831, 1846 and in the 1930s.
Output (grade 3): The façade was made stronger with triangular brick wedges in 1807 and 1827. The inside was repaired in 1831, 1846 and in the 1930s.