Near the Motława River between ul. Świętojańska and ul. Straganiarska you'll find this huge brick vault dating from the 1300s. Having had the misfortune to have been built on swampland, what remains of the edifice is slowly sinking on one side. Though it was burnt and completely abandoned after WWII, it's now the subject of a huge refit that might well see it return as one of the great landmarks of Gdańsk. Many of the interior fittings have been moved to St. Mary's but its famous 12 metre high renaissance altar remains. The remarkable phantom of a church is at last being saved and interior renovations won't affect visitors, so enjoy.