St. Nicholas of Zarazsk
Legend has the icon of St Nicholas of Zarazsk present in the church where Vladimir the Great was baptized in AD 988. In 1225 the icon was brought from Cherson (Korsun), then a Greek colony, to Ryazan. This journey took it through Novgorod, where it remained for a time. Durinig this time in Novgorod, the icon became associated with miracles, as it was believed to have brought Novgorod through the Tartar invasion unscathed.
This journey took the icon through the dangerous Polovtsian territory in the lands of the Tartars. St. Nicholas miraculously guided the keeper of the icon, Father Eustathius, until the icon was delivered to Prince Theodore of Ryazan.
When the Tartars advanced on the principality of Ryazan in 1237, Prince Theodore was captured and later died. His wife Eupraxia then threw herself and her baby son from the bell-tower of a church (or palace) to avoid captivity. This act is said to have given the town, previously known as Krasny, and the icon the name, "Zarazsk," from the word zarazit'sya which means "fall to death."
In 1513 the icon was moved to Kolomna, where it became known for performing miracles, leading to greater devotion. Copies of the icon spread throughout Russia, contributing to Saint Nicholas' great influence.
The St. Nicholas of Zarazsk icon depicts the saint with his arms wide in a posture of prayer or intercession, the right hand in blessing and the left hand holding the Gospel book. This posture comes from the original icon (1225) endowing the saint with the power to defend cities from attack.
SOURCES
Ten Miracle-Working Icons of Saint Nicholas, A Reader's Guide to Orthodox Icons
The Tale of the Destruction of Ryazan, Wikipedia
George Mitrevski, "Russian Icons," pelister.org
Zaraysk, Small Towns of Russia