#TodayILearned that in the mid-1960s, Oklahoma City tore down almost 450 downtown buildings to make way for a grand rethinking of the entire business district, designed by famed architect IM Pei, but then never actually implemented the plan, leaving the entire city's downtown an empty wasteland for decades.

https://www.retrometrookc.org/collections/i-m-pei-plan/