Complex sentence: The name "Csodamalom" (Magic Mill) preserves the name of Fábián Mill, which was the former building of the company since then they had moved to 11, Kossuth Street.
Split into simpler sentences: The name "Csodamalom" (Magic Mill) preserves the name of Fábián Mill, which was the former building of the company. Since then they had moved to 11, Kossuth Street.