Innenstadt, Cologne in the context of Deutz, Cologne

The twelve Romanesque churches of Cologne are twelve landmark churches in the Old town (Altstadt) of Cologne, Germany. All twelve churches are Catholic.

The reason for the large number of churches was that in the Middle Ages Cologne was, along with Paris, the largest and most important city north of the Alps, and both were already important centers in Roman antiquity (Cologne's name was Colonia Claudia Ara Agrippinensium, the provincial capital of Germania Inferior). Christianity also has a long tradition in both cities; the first bishop of Paris was the missionary Dionysius of Paris (around 250), the first bishop of Cologne was Maternus of Cologne (c. 285-315 AD), a close confidant of Roman Emperor Constantine the Great.

The City Hall (German: Kölner Rathaus) is a historical building in Cologne, western Germany. It is located off Hohe Straße in the district of Innenstadt, and set between the two squares of Rathausplatz and Alter Markt. It houses part of the city government, including the city council and offices of the Lord Mayor. It is Germany's oldest city hall with a documented history spanning some 900 years. The history of its council during the 11th century is a prominent example for self-gained municipal autonomy of Medieval cities.

Today's building complex consists of several structures, added successively in varying architectural styles: they include the 14th century historic town hall, the 15th century Gothic style tower, the 16th century Renaissance style loggia and cloister (the Löwenhof), and the 20th century Modern Movement atrium (the Piazzetta). The so-called Spanischer Bau is an extension on Rathausplatz but not directly connected with the main building.

Cologne Bonn Airport (German: Flughafen Köln/Bonn „Konrad Adenauer“) (IATA: CGN, ICAO: EDDK) is an international airport in north-western Germany. It serves the country's fourth-largest city Cologne, as well as Bonn, the former capital of West Germany. In 2024, more than 10 million passengers passed through Cologne Bonn Airport (CGN). It is the first time that passenger numbers have exceeded those in 2019 and hence marks a return to pre-pandemic levels. It is the seventh-largest passenger airport in Germany and the third-largest in terms of cargo operations. By traffic units, which combines cargo and passengers, the airport is in fifth position in Germany. As of March 2015, Cologne Bonn Airport had services to 115 passenger destinations in 35 countries. The airport is named after Cologne native Konrad Adenauer, the first post-war Chancellor of West Germany. The facility covers 1,000 hectares (2,500 acres) and contains three runways.

The airport is located in the district of Porz and is surrounded by Wahner Heide, a nature reserve. The airport is centrally located in the Cologne Bonn Region 12 km (7.5 mi; 6.5 nmi) southeast of the Cologne city centre and 16 km (9.9 mi; 8.6 nmi) northeast of Bonn. Cologne Bonn Airport is one of the country's few 24-hour airports and serves as a hub for Eurowings, FedEx Express and UPS Airlines as well as a focus city for several leisure and low-cost airlines. It is also a host of a training centre for the German (DLR) and European (EAC) astronaut programmes, part of the European Space Agency. The German Aerospace Center (DLR) formerly used an Airbus A300 ZERO-G aircraft at Cologne/Bonn Airport to simulate zero gravity conditions for research. This aircraft, also known as the "Zero G", is no longer used for research flights but has been stationed at the airport since 2015 and is now an interactive museum exhibit. It can be found outside of the airport, near close to Terminal 2.