Why was Saint Denis not completed during Suger's lifetime?

Answer 1

The main spire kept collapsing, requiring a new design

Answer 2

Saint Denis was not completed during Suger's lifetime because of various factors, such as lack of funding, political instability, and the complexity of the architectural design. Suger's ambitious plans for the basilica required time, resources, and skilled labor, which were difficult to secure during his lifetime. Additionally, the construction process was often interrupted by external events and challenges beyond his control.