In the assumption, the impressive Green Gate building was to be the seat of the Third Order, i.e. a hundredperson representation of merchants and craftsmen in the city authorities. However, these plans were quickly changed and the residential part expanded to accommodate the kings visiting Gdansk. Unfortunately, as sources claim, no ruler in the Green Gate has lived for longer. The gate therefore had various other functions for example, the armory, but also places for revelries, feasts and demonstrations (on the second floor there is a huge, 300 square meter hall lit up on all sides with 25 windows). In the nineteenth century, the Green Gate was rebuilt several times, once being changed, it again was restored to its former appearance. The Natural History Society was located here, and so was the Natural History Museum until the outbreak of World War II. After the war (and reconstruction from destruction) the Office of Conservation of Monuments was located in the Green Gate, and presently there is a branch of the National Museum and the Gdansk Gallery of Photography.