Complex sentence: Grochów was severely damaged in the fighting and even in 1827 it had only 105 inhabitants and 22 houses, but the population grew again rapidly and by the end of 1820s several weaving plants and tobacconists' shops were founded.
Split into simpler sentences: Grochów was severely damaged in the fighting, and as late as 1827 had only 105 inhabitants and 22 houses. Then the population grew again rapidly, and by the end of the 1820s several weaving plants and tobacconists' shops were founded.