St. Ambrose was declared a saint before the official canonization
process was instituted in the 12th century. He would have been declared a
saint to the bishop by those who knew him best and were familiar with his
life and merits. The local bishop would them make the decision. Today
only the pope can declare saints after years of study by the Sacred
Congregation for the Causes of Saints in the Vatican. The church does not
create saints. Only God can do that. The Church "screens" candidates for
sainthood to determine if they had a life worthy of emmulation. In other
words, do they make good role models. Also, the Church has to be assured
that the person is actually in Heaven. That is the reason that today a
number of miracles must be verified before a person can be declared a
saint.
Saint Ambrose was not formally canonized by the Catholic Church in the traditional sense because he lived before the formal process of canonization was established. He is recognized as a saint due to his reputation for holiness and his significant contributions to the Church during his lifetime in the 4th century.
St. Ambrose was canonized in the early Church, likely shortly after his death in 397 AD. He is considered a Doctor of the Church and his feast day is celebrated on December 7th.
There is no such canonized saint.
No, he is not a canonized saint.
For an excellent biography of Saint Ambrose that will explain why he is a saint, click on this link.
Saint Ambrose University was created in 1882.
There is no such canonized saint.
St. Ambrose baptized St. Augustine of Hippo.
December 7 is the feat day of Saint Ambrose.
There is no such canonized saint.
Saint Cecilia was canonized by the Catholic Church in the 4th century.
Saint Ambrose of Optina was born on 1812-12-05.
Saint Ambrose of Optina died on 1891-10-23.