Note 225 — Chapter III

There is, I think, good reason to believe the testimony of the anonymous biographer, who says this Treatise was written before Alberti's thirtieth year; and if he returned to Florence in 1434, we must take the date of his birth about 1404. The scene of the Tranquillità dell'Animo is laid in the Duomo at Florence; we may therefore believe it to have been a later work, and its allusions to the Famiglia are, in my opinion, trustworthy.