1. Cologne Cathedral, also known as Kölner Dom, is a stunning example of Gothic architecture and is one of the most visited landmarks in Germany. Here are some interesting facts and a description of the cathedral:

- The construction of the cathedral began in 1248 but was not completed until 1880, taking over six centuries to build.

- It is the largest Gothic church in Northern Europe and has been designated a UNESCO World Heritage Site.

- The cathedral is 157 meters (515 feet) tall and initially surpassed the Great Pyramid of Giza as the tallest structure in the world until the completion of the Washington Monument.

- The cathedral houses the Shrine of the Three Kings, which is believed to contain the remains of the Biblical Magi who visited Jesus.

- It was severely damaged during World War II but was later restored to its original beauty.

The Cologne Cathedral is characterized by its intricate architectural details, including its stunning stained glass windows, vast interior spaces, and elaborate sculptures. The Gothic design features pointed arches, flying buttresses, and intricate carvings. Visitors can explore the various chapels, climb the tower for panoramic views of the city, and admire the numerous works of art and artifacts inside.

2. The working hours of the cathedral are as follows:

- Monday to Saturday: 6:00 am to 7:30 pm

- Sunday and holidays: 1:00 pm to 7:30 pm

If you have any further queries or require specific information, the contact phone number for the cathedral is +49 221 17940.

3. Admission to the cathedral is free, but there are some optional areas and activities that require tickets:

- Access to the tower: Tickets can be purchased at the entrance of the cathedral. The cost is around €8 for adults and €2.50 for children (subject to change).

- Treasure Chamber: Located in the south transept, tickets can be purchased at the entrance to the chamber. The cost is around €6 for adults and €2.50 for children (subject to change).

- Organ concerts: Various concerts take place in the cathedral, and tickets can be purchased in advance or at the venue. Prices vary depending on the event.

The cathedral is easily accessible by public transportation. The nearest train station is Köln Hauptbahnhof (Cologne Central Station), which is well-connected to other cities in Germany and Europe. From there, it is a short walk to the cathedral.