St. Mary's Church
What the experts agree on
World's largest brick church with jaw-dropping scale—105m long, holding 20,000 people across 31 chapels. Gothic frescoes and soaring nave make it an essential Gdansk landmark, though its massive interior can feel austere.
2 Stars
"This imposing basilica is the largest brick church in Europe (105.5m x 66m). Covering a surface area of 4 900m2, it can accommodate up to 20 000 people. " Full review
"This enormous red-brick church is the largest of its kind in the world. Its nave and 31 chapels can hold more than 20,000 people...some frescoes can be found behind the altar." Full review
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Note the 500-year-old astronomical clock, dating from 1464, an oddity for a medieval Catholic establishment: It not only tells time, but also gives the phases of moon and shows the position of the sun and the moon in relation to the zodiac signs.