It is the same as for anyone - they must have lived a life of heroic virtue and had at least 2 proven miracles.
No, he is not a canonized saint.
He was canonized in 1083 A.D by Pope Gregory
Benedict was canonized in the year 1220 by Pope Honorius III. --
She was canonized on December 8, 1933, by Pope Pius XI.
There was a Pope Leo XIII but he has not been canonized as a saint.
Saint Elisabeth of Hungary was canonized by Pope Gregory IX in the 1235.
Pope Benedict XV canonized Joan in May of 1920.
He was canonized on May 29, 1954, by Pope Pius XII.
Edward was canonized in the year 1161 by Pope Alexander III.
Yes. He was canonized on July 16, 1228, by Pope Gregory IX
Saint Teresa of Avila was canonized by Pope Gregory XV on March 12, 1622.
Saint Raymond of Penafort was canonized by Pope Gregory IX on March 29, 1601.