 In 1945, after the Allied victory in the Second World War he was restored to his rank of university professor, but he was not allowed to give lectures, since, according to the bureaucracy and the laws resulting from the Concordat, which were retained by the new government, teaching in any Italian State University was forbidden to any excommunicated priest.He died on April 20, 1946 in Rome.He was honoured as Righteous among the nations (n°12380)in 2012 for hiding Jews in German/fascist controlled Rome, while isolated by excommunication

The complete works of Buonaiuti are very extensive