How many letters does the top answer for “home of domus augustana” have?

The most common answer is rome (4 letters).

Crossword clue: home of domus augustana

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

rome 4 letters wd-fact-v3

capital and largest city of Italy; on the Tiber; seat of the Roman Catholic Church; formerly the capital of the Roman Re

home of domus aurea 50% similar → romacapitale

home of domus tiberiana 50% similar → rome

home of unipol domus 50% similar → cagliari