Cologne is an absolutely massive city to walk across and its probably not advisable to try and see every single church on a single walking tour. Below is a list of opening hours for the main destinations that I mention in the guide
| Destinations | Opening Hours |
|---|---|
| Cathedral | Everyday 6am–8pm |
| St. Andreas | Everyday 8am–6pm |
| St. Gereon | Everyday 10am–6pm |
| St. Maria im Kapitol | Everyday 10am–6pm (Sunday 12pm-6pm) |
| Great St. Martin | Tuesday-Sunday 9:30am–7:30pm |
| St. Georg | Everyday 9am–6pm |
| St. Ursula | Tue-Sat 10am–12pm, 3–5pm & Sun 3-5pm |
| St. Cunibert | Everyday 10am–6pm |
| St. Pantaleon | Monday-Saturday 9am-5pm & Sunday 12pm-5pm |
| St. Aposteln | Everyday 10am–1pm & 3–5pm (Gates open only for service) |
| St. Severin | Monday-Saturday 9am–12pm & 2:30–4:45pm |
| St. Maria in Lyskirchen | Everyday 10-6pm |
| St. Maria Ascension (Maria Himmelfahrt) | Everyday 10-6pm (Gates open only for service) |
| St. Cecilia – Museum Schnütgen | Tuesday-Sunday 10am–6pm |
In the case of Cologne, a priority list is absolutely in order. I would recommend the churches directly in the vicinity of the main station: the Cathedral, St. Andreas and St. Maria Himmelfahrt, which in any case happen to be some of the most beautiful. Beyond this, St. Gereon and St. Maria im Kapitol are worth the extended walk. The others will depend on your interest in historical architecture and vary in their level of preservation.
