religious services
Holy mass in catholic churches in downtown Düsseldorf:
Franziskanerkirche
ImmermannstraÃe/OststraÃe near the central station. (http://www.franziskaner-d...). Su: 10AM, 12PM; M-F: 3:30PM.St. Maximilian
SchulstraÃe/Maxplatz Altstadt. (http://www.maxkirche.de/). Su: 10AM, 11:30AM, 6PM; M-Sa: 6PM.St. Andreas
HunsrückenstraÃe near to the Kunsthalle, Altstadt. (http://www.dominikaner-du...) Sun: 8:30, 11:00, 18:00; Mon-Sat: 12:00, 18:00 except FriSt. Lambertus
Basilika minor, Stiftsplatz near the Rhine bank, Altstadt. (http://www.lambertuskirche.de/) Sun: 10:30AM, 5PM; Mo-Sa: 5PM.Index of churches of all Christian denominations in Düsseldorf: (http://www.ekir.de/duesse...).
Jüdische Gemeinde Düsseldorf
Chabad of Düsseldorf Jewish Synagogue and Center that holds weekly Sabbath services as well as other events.
respect
Düsseldorf is in a strong rivalry with its neighbor city Cologne, especially concerning comparisons between the local beers. Cologne is almost twice the size of Düsseldorf in terms of population, and the Cologne Cathedral is known nationwide. Düsseldorf is an economic powerhouse and capital city of the state of NRW. If you have been to Cologne, try to avoid any comparisons between the two cities.
spelling
In German, umlauts like ü can be transcribed as ue, so the correct spelling when no umlauts are available would be Duesseldorf. While normally, incorrectly replacing an umlaut with a single vowel will simply give a nonsense word, this is not the case for Düsseldorf. In fact, "Dussel" is a dated word meaning "fool", and "dorf" means "village", so "Dusseldorf" actually means "village of fools".