Blazon: Per pale azure a church on a mount in base proper, in chief the letter Y or, and argent a wolf rampant gules
Both the wolf and the letter Y derive from the municipal arms of nearby regions. The red wolf, also known as the “Passau wolf,” has been used by the diocese of Passau since at least 1259. The Y is an abbreviation of “Yppolytus,” or St. Hippolytus of Rome, after whom the diocese of St. Pölten was named. The church is probably a depiction of the local church of St. James. The current building dates back to the 14th century, but mentions of a church on the same site date back to 985.
Blazon: Per pale I per quarterly i and iv gules a castle triple-towered or windowed azure (Castile), ii and iii argent a lion rampant purpre crowned and armed or, langued gules (León); II azure a castle triple-towered or windowed of the field on a mount in base proper, in chief a molet of eight points argent
Blazon: Vert a fess ermine of five spots between in chief an eagle displayed, wings inverted perched on a thunderbolt fesswise between two garbs or and in base on water barry wavy argent and azure a Viking ship of third, sails of the fourth
Crest: On a wreath vert and argent on a mount an oak tree proper fructed or bound thereto by a chain proper two anchors in saltire of the third
Supporters: On the dexter a Lincolnshire Red Shorthorn Bull and on the sinister a Lincoln Longwool Ram both guardant proper, each supporting a croizer or
Blazon: Gules on a pale between two serpents erect argent a dexter wing of the field, surmounted by a triple mount in base proper
The arms were originally granted as shown by Ferdinand I, Holy Roman Emperor sometime between 1522 and 1529. It was re-granted by Maximilian II, Holy Roman Emperor in 1569. The color combination is likely inspired by the Austrian coat of arms, but the origin of the charges is unclear.