Simplify the following text for a Grade 11 native English-speaking person.
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 .