Roskilde

City · c. 1402 CE · in Europe

Capital of Kalmar Union (1402–1443).

Uppsala (c. 1402 CE): Capital of Kalmar Union (1402–1436).
Belgrade (c. 1402 CE): Capital of Serbian Despots (1402–1421), Kingdom of Serbia (1882–1884), Yugoslavia (1919–1945), and 2 more.
Jambi (1401 CE): Capital of Sultanate of Jambi (1670–1904).
Shuntian Fu (1403–1914 CE): Capital of Ming Dynasty (1421–1644), Qing Dynasty (1645–1911).
Diyarbakir (c. 1407 CE): Capital of Aq Qoyunlu (1407–1468).
Malacca (1396 CE): Capital of Sultanate of Malacca (1459–1511).
Iasi (1408 CE): Capital of Principality of Moldavia (1564–1858), United Principalities of Moldavia and Wallachia (1859–1862).
Cirebon (1389 CE): Capital of Sultanate of Cirebon (1482–1676).
Suceava (1388 CE): Capital of Principality of Moldavia (1388–1564).
Bidar (c. 1425 CE): Capital of Bahmani Sultanate (1425–1491), Bidar Sultanate (1527–1618).

Around the same time and place

Printing press (c. 1440 CE): Gutenberg's press with movable metal type made mass production of books possible, transforming the spread of knowledge in Europe.
Leonardo da Vinci (1452 CE – 1519 CE): Italian Renaissance polymath born in Vinci, painter of the Mona Lisa and The Last Supper, whose notebooks record studies in anatomy, engineering and flight.
Hundred Years' War (1337–1453 CE): Series of wars between England and France over the French throne, ending with England losing all its French lands except Calais.
Hanseatic League (1356 CE): Confederation of merchant guilds and market towns that dominated Baltic and North Sea trade; its first general diet met in Lübeck in 1356.
Hanseatic trade route (1356–1669 CE): The Hanseatic League of north German merchant towns, led by Lübeck, dominated Baltic and North Sea trade from London and Bruges to Novgorod, exchanging furs, wax, grain, fish and timber for cloth and salt.
Johannes Gutenberg (c. 1400 CE – 1468 CE): German goldsmith from Mainz who introduced printing with movable metal type to Europe.
Joan of Arc (c. 1412 CE – 1431 CE): French peasant girl who led French forces to lift the siege of Orléans; she was captured, tried for heresy and burned at Rouen.
Dome of Florence Cathedral (1436 CE): Brunelleschi's dome, completed in 1436, was the largest built since antiquity and a landmark of Renaissance architecture.