Complex sentence: A new Allegheny Observatory was built between 1900-1912 in today's Riverview Park, and remains owned and operated by the University of Pittsburgh for education, astronomical research, and public lectures and tours.
Split into simpler sentences: A new Allegheny Observatory was built between 1900-1912 in today's Riverview Park. It is owned and operated by the University of Pittsburgh for education, astronomical research, and public lectures and tours.