Assertion: mihrab's dome | /r/CapableOf | suffer partial collapse
Facets:
value: in 557
type: TEMPORAL
Source sentences:
text: When the first dome suffered a partial collapse in 557, its replacement was designed by Isidore the Younger (the nephew of Isidoros, one of the original architects) with structural ribs and a more pronounced arc, and this version of the structure remains in place today.