It doesn't always have to be the staircase of the Würzburg Residence. Instead, Rainer Leng recommends a trip to the Amorbach Monastery with its Rococo library. From the largest castle ruin to the longest bratwurst: there are still many unknown treasures to discover in Mainfranken. Historian Rainer Leng has been an adjunct professor of Medieval History at the University of Würzburg since 2008. In his free time, he explores the ancient cultural landscape along the middle course of the Main River, including by motorcycle. In the richly illustrated book "Unknown Mainfranken," he shares entertaining yet well-researched stories from the history of his homeland. He knows the most beautiful valley in the Spessart and an almost unknown church designed by Würzburg Baroque architect Balthasar Neumann. He knows where the stones for the cathedrals in Worms, Mainz, and Speyer were quarried.