Wetzlar is a city located in the central part of Germany, known for its rich history and picturesque old town. It is situated along the Lahn River and is part of the Hesse state. The city features several historical buildings, including the Wetzlar Cathedral, which showcases stunning Gothic architecture. Wetzlar is also recognized for its connection to the famous writer Johann Wolfgang von Goethe, who visited the city in the late 18th century. Today, Wetzlar is a center for optics and precision engineering, housing several companies that specialize in these fields, contributing to its economic significance.