Two churches in Kutna Hora. Sedlec Cathedral has 2 tickets and tours to book; Sedlec Ossuary has 3 tickets and tours to book. The table and the two notes below put them side by side; the full pages have what to see, the ticket and the timing for each.
This is the large church in Sedlec, on the northern edge of Kutna Hora, and it is almost always bought as part of a combined ticket with the bone chapel five minutes away and, in the fuller version, with Saint Barbara's church across town. Buy the combination rather than separate entries; it is cheaper and the three buildings only make sense together. Day trips from Prague, an hour away by train or coach, use exactly that route.
The ossuary has its own timed ticket, bought online or at the visitor centre next door, and slots sell out in summer; walking up without a booking often means a wait or a refusal. A combined ticket covers the ossuary, the Cathedral of the Assumption beside it and St Barbara's Church in the town, and costs little more than two separate entries, which makes it the sensible buy. Photography inside requires an additional permit, sold with the ticket, and the rule is enforced.