Two churches in Bratislava. Blue Church has 1 ticket or tour to book; St Martin’s Cathedral, Bratislava has no online ticket listed. 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.
Entry is free but the church is open only for a short window each day, usually around the morning and evening masses, and locked the rest of the time; most visitors see it from outside. That makes the timing more important than any ticket. Walking tours of the Old Town include it and cost a moderate amount, though guides cannot get you in either.
Saint Martin's Cathedral stands at the western edge of Bratislava's Old Town, below the castle and beside the busy motorway bridge, and entry to the cathedral is by a small admission for tourists outside service times, which covers the nave, the crypts and the treasury. It is the most important church in Slovakia, where the kings and queens of Hungary were crowned for almost three centuries.