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.
The 1569 grant of arms