Tours of the Basilica are possible every day, except Sundays from 9.00 a.m. to 5.00 p.m..
The temple is still in use, so there may be some changes to the availability of the tours, related to the services taking place in the cathedral.
Cathedral Basilica in Pelplin
Diocesan Tourist Information Centre
Monday-Saturday: 9:00 a.m. to 5:00 p.m.