The cathedral inside the castle walls — with a free section at the door and a ticketed one beyond it, which is the single fact most visitors arrive without.
What it costs
There is a free area just inside the west door. You can stand in it, look down the nave, and see the scale. To walk further in — past the barrier, along the aisles, up to the chapels and the tomb — you need a castle circuit ticket, bought at the castle information centres rather than at the cathedral door.
That arrangement catches people out constantly: the cathedral is not separately ticketed, so if you arrive without a circuit you either look from the entrance bay or go back out and buy one.
When to go
The free bay is small and it is where every visitor without a ticket ends up, so it is busiest exactly when the castle is. Early is better here for the same reason it is better everywhere in Prague.
The cathedral closes to visitors during services. That is not seasonal and not posted far in advance — it simply happens.
Getting there
Inside the third courtyard of Prague Castle; tram 22 to Pražský hrad.
If you only have an hour
If you have a circuit ticket, walk the south aisle first — that is where the Mucha window is, and where the light is. If you do not, stand in the free bay for five minutes, look up, and spend the rest of the hour on the castle grounds outside, which cost nothing and are more rewarding than a rushed interior.
What people get wrong
The window everyone photographs — the vivid one in the north side, full of blues and reds — is twentieth-century, designed by Alfons Mucha and installed in 1931. It is often described as medieval. The building around it took nearly six hundred years to finish, and the west front you walk through is younger than the Eiffel Tower.
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Nearby
Ticketing arrangements and opening patterns as published for 2026 and checked on 4 September 2026. These change without much warning — confirm with the site itself before you travel. More sights, and how they fit together, in Landmarks & Sights.