Czar Alexis of Russia (1645–1676) gave an
icon of the Mother of God of Kazan as a founding blessing gift to the city of Penza
in 1666. People carried the holy image on their hands all the way from Moscow
and then placed it in the Cathedral church in Penza. Those who came to the icon
with faith always received help. 
The miracle-working icon of the Mother
of God of Penza has also saved its city from invasion. On the eve of August 4
1717, during the attackers of the Tatar when all hope to save the city seemed
to have been lost, people gathered in the church for an all-night vigil. In the
morning, people brought the icon out for a procession near the walls of the
city and began to sing an akathist. When the invaders came close to the city,
the image of the Mother of God got darker and the holy icon turned away from
the enemy. While the residents of the city where praying confusion started inside
the invaders army and they turned around and ran.
A feast day for this icon was established in the end of the 19th Century.
Translated from: https://azbyka.ru/days/ikona-kazanskaja-penzenskaja
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