How many letters does the top answer for “who painted the sistine chapel” have?

The most common answer is michelangelo (12 letters).

Crossword clue: who painted the sistine chapel

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

michelangelo 12 letters otdb

Florentine sculptor and painter and architect; one of the outstanding figures of the Renaissance (1475-1564)

home of sistine chapel 50% similar → vaticancity