In 1821, the Bishopric of Constance was dissolved and became part of the Archdiocese of Freiburg. Konstanz became part of the German Empire in 1871 during the unification of Germany. After World War I it was included within the Republic of Baden. On 22 October 1940, 110 of the last Jewish residents were deported to Gurs internment camp in France. Most of those who were still alive in August 1942 were murdered in either Sobibór or Auschwitz. Because it almost lies within Switzerland, directly adjacent to the Swiss border, Konstanz was not bombed by the Allied Forces during World War II. The city left all its lights on at night, and thus fooled the bombers into thinking it was actually part of Switzerland . After the war, Konstanz was included first in South Baden and then in the new state of Baden-Württemberg. The "Altstadt" (Old Town), which is large considering the small size of modern Konstanz, has many old buildings and twisting alleys. The city skyline is dominated by Konstanz Cathedral, several other churches and three towers left over from the city wall, one of which marks the place of the former medieval bridge over the Rhine. The University of Konstanz was established close to the town in 1966. It houses an excellent library with approximately two million books, all freely accessible 24 hours a day, as well as a botanical garden (the Botanischer Garten der Universität Konstanz). Especially since 2007, the university, being one of the nine German universities most successful in the German Universities Excellence Initiative, has gained considerable reputation as a so-called "elite university". Konstanz was the birthplace of Count Ferdinand von Zeppelin, constructor of the famous Zeppelin airships. In the late 2010s, Konstanz has become a popular destination for "Einkaufstourism", or cross-border shopping by Swiss due to lower prices on basic items in Germany, a favorable exchange rate between the Swiss franc and the euro, and a generous German VAT refund for non-European Union residents. Retail chains such as H&M and dm have built large new stores near the town's central square to cater to this trade, and some Konstanz residents feel the city is losing its historic character in the process; many of them avoid the area on Saturdays. This has led to friction with officials from Kreuzlingen as their city has seen no economic benefit from this trade, and they have been requesting that their national government bring up the issue of the VAT refund with Germany.