Answer
Sainte-Chapelle, a renowned Gothic masterpiece in Paris, owes its restoration to the efforts of Viollet-le-Duc, a prominent 19th-century architect. Viollet-le-Duc's meticulous restoration, which spanned several decades, involved the careful repair and replacement of damaged elements, including stained glass windows, sculptures, and architectural details. His work aimed to preserve the chapel's historical integrity while enhancing its structural stability and aesthetic appeal.