| Dr. Friedrich Joseph Haass | |
| Native Name: | Фёдор Петрович Гааз |
| Native Name Lang: | ru |
| Birth Date: | 10 August 1780 |
| Birth Place: | Bad Münstereifel |
| Death Place: | Moscow |
Dr. Friedrich Joseph Haass (Russian: Фёдор Петрович Гааз, Fyodor Petrovich Gaaz; 10 August 1780 –) was the "holy doctor of Moscow".[1] [2] Born in Bad Münstereifel, as a member of Moscow's governmental prison committee, he spent 25 years until the end of his life to humanize the penal system.[1] During the last nine years before his death, he spent all of his assets to run a hospital for homeless people. He died in Moscow. Twenty thousand people attended his funeral at the Vvedenskoye Cemetery, which was paid for by the state as he had no more money.[1]
He has a Catholic remembrance day of the 16th of August.[1]