The building where the Convention of Moss was signed in 1814 still stands in the town centre, making Moss one of the few places in Norway where you can stand in a room where a genuinely consequential moment in the country's history actually happened. The convention ended the brief war between Norway and Sweden and established the political union that would last until 1905.
The building is modest by the standards of the history it witnessed — a solid early nineteenth-century structure typical of prosperous Norwegian commercial towns of the period. It is marked and accessible to visitors. For anyone interested in Scandinavian history or the remarkable year of 1814, when Norway went from Danish rule to independent constitution to Swedish union in the space of a few months, it is worth the short detour.