Issues with oldenburger-wallmuseum.de access could stem from improper redirect settings between different versions of the site. Check the following links for alternative routes:

http://oldenburger-wallmuseum.de http://www.oldenburger-wallmuseum.de https://oldenburger-wallmuseum.de https://www.oldenburger-wallmuseum.de

Or return to the current status page of oldenburger-wallmuseum.de.