Original: In addition, between 1840 and 1849 the main Catholic church was refurbished by many of Poland's most notable architects of the era, including Piotr Aigner, Antonio Corazzi and Enrico Marconi.
Simplified: Between 1840 and 1849 the main Catholic church was re-done Polish architects of the era, including Piotr Aigner, Antoni Corazzi and Henryk Marconi.