Complex sentence: Each part of the Museum became autonomous museums in 1875: that one of Autonomy was moved in Palace Botta in 1903, like that one of Zoology in 1935; instead the section of Mineralogy was moved to another part of the Palace.
Split into simpler sentences: Each part of the museum became an autonomous museum in 1875: that one of Anatomy was moved into Palace Botta in 1903, likewise the one of Zoology was moved in 1935. Instead, the section of Mineralogy was moved to another part of the Palace.