I might also add that Colonel Mueller received a message (forged by one of the Jewish refugees who spoke German, and who got a job with the German Army) 'signed' by Field Marshall Albert Kesselring, Commander of Northern Italy, that declared Assisi an 'open city', and thus spared it from destruction as the Allies [the British in this case] drew closer. He had no idea that the document was a forgery. The SS had already placed sapper mines around the important public buildings in Assisi, ready to blow everything up and make a 'scorched earth' of the city. And at his order, the mines were dismantled and all Germans 'bugged out' of Assisi in advance of the liberation by the Brits in August 1944.
The SS man, a thoroughly nasty Nazi, demanded of Colonel Mueller, 'Are you a German, or are you a Catholic?' The Colonel said calmly, 'Both...'
In the 1950s Colonel Mueller came back to Assisi with his family. The citizens, aside from a few Communists, hailed him as a hero and welcomed him with open arms. Padre Rufino was still at San Damiano, and he showed the Mueller family all around the sites connected with St. Francis. Sadly, a few months after his return to his Bavarian hometown, Colonel Mueller died of a brain tumor at the age of sixty. On his tomb there is an outline map of Assisi, in memory of his love for the city of St. Francis.
As the OP noted, Padre Rufino received the title of 'Righteous Gentile' from the government of Israel. Bishop Nicolini also received the honor, though posthumously. His successor received it in his name. There was also recognition for Don Aldo Brunacci, the Archpriest of San Rufino Cathedral in Assisi, Madre Giuseppina of San Quirico Monastery, and others who were involved in the underground operation.
My first trip to Assisi (and to Italy and Europe, for that matter) was in October 1977. The following month Padre Rufino died in his hometown of Deruta, which is not far from Assisi. May he rest in peace!