Mariacka Gate - historic , one of the gates of the Main Town of Gdansk . It is located on the Motlawa River at Długie Pobrzeze , at the outlet of Mariacka Street and next to the House of the Natural Society .The gate has late Gothic forms. It was probably built in the last quarter of the 15th century (first mentioned in 1484 ), on the plan of an elongated rectangle about 25 m × 7.3 m, closing the outlet of Mariacka Street. From the adjacent Chlebnicka Gate differs from the larger asymmetry and more massive, octagonal turrets flanking the east façade .In the 16th century the gate lost its military significance and was rebuilt into flats. After considerable destruction in 1945 , the gate was rebuilt in 1958-1996 and was used for the Archaeological Museum .