If the development of Bergen was rather slow during the Middle Ages and the early part of the Modern Age, due mainly to fires in 1354, 1585 and 1796, the agricultural reform in the 19th century and the town's connection to the Celle–Soltau railway led to far-reaching changes.
Kui Bergeni areng oli keskajal ja uusaja alguses üpris aeglane, peamiselt tulekahjude tõttu 1354., 1585. ja 1796. aastal, tõi põllumajandusreform 19. sajandil ja linna ühendamine Celle–Soltau raudteega kaugeleulatuvad muudatused.