The most beautiful of all the city's preserved gates, the cross gate, leads from the west into the Old Town. Four small corner towers and sparingly used limestone decorations embellish the red brick gateway tower from the late 14th century, a Romantic witness to medieval architecture.
http://www.ingolstadt-tourismus.de/en/exploreingolstadt/sightseeing/kreuztor-emblem-of-the-city.html