- theblogofdimi.com cologne-north-rhine-westphalia-…
- http://apgrd.ox.ac.uk productions/venues/1648
- peapix.com bing/6826
- dataguidance.com news/north-rhine-westphalia-…
- http://world-guides.com europe/germany/north-rhine-…
- tripmondo.com germany/north-rhine-westphalia/…
- latlong.net place/cologne-north-rhine-westphalia-…
- commons.wikimedia.org wiki/File:NRW,_Cologne_-_St…DescriptionNRW, Cologne - St.Maria Himmelfahrt 01.jpg. Русский: Северный Рейн - Вестфалия, Кёльн - Церковь Успения Пресвятой Богородицы.
- land.nrw english