Guess you had better edit Wiki SaQSoN.
In 325, he was one of many bishops to answer the request of Constantine and appear at the First Council of Nicaea. There, Nicolas was a staunch anti-Arian and defender of the Orthodox Christian position, and one of the bishops who signed the Nicene Creed.
Saint Nicholas is a popular subject portrayed on countless Eastern Orthodox icons, particularly Russian ones. He is depicted as an Orthodox bishop, wearing the omophorion and holding a Gospel Book. Sometimes he is depicted wearing the Eastern Orthodox mitre
http://en.wikipedia.org/wiki/Saint_Nicholas