Complex sentence: By 1921, Alumni Hall (now known as Eberly Hall), designed Benno Janssen (the runner-up for the previous campus plan architectural competition), was dedicated and signified a departure from (and end to) the Acropolis Plan.
Split into simpler sentences: By 1921, Alumni Hall (now known as Eberly Hall), designed by Benno Janssen (the runner-up for the previous campus plan architectural competition), was dedicated. It signified a departure from (and end to) the Acropolis Plan.