Together with the Braunauer Gate, the Schärdinger Gate is the second preserved town Portal of the old fortifications.
The Erl Gate (named after the "Erlen", the alder trees at the moat) and the Münsterer Gate were the only Exits from the town of the North. Official gate guards who lived on an upper floor controlled the traffic of People and goods until 1808.

Formerly known as the "Erltor" (after the alders on the moat) or "Münsterer Tor", it was the only exit to the north.
Until 1808, official gatekeepers, who lived on the upper floor, controlled the movement of people and goods.