"The crown jewel
The highlight of the Treasure chamber at IBRA 2023 is the legendary "Bordeaux Letter" with the 1p and 2p stamps of the famous Mauritius POST OFFICE stamps. The valuable letter, provided by the lender via the company Richard Borek in Braunschweig, is today estimated at a market value of up to 6 million euros.
Essen has just under 590 000 inhabitants and is an important industrial location. Well-known large companies such as E.ON have their headquarters here. With its museums, theaters and universities, Essen also plays an important role in art, culture and education. In 2017, Essen was the "Green Capital of Europe".
Tourist destinations in the surrounding area are Düsseldorf (Königsallee, Old town), Cologne (Cathedral/Dome) and Aachen (Cathedral from 803).