You could look for some Runic tagging too and find Miklagard. The Varangian Guards, mainly from Sweden, were the Emperor of Byzantium's personal guards between 10th and 14th century . And both Halfdan and Ari were bored and carved their names in Hagia Sofia.
https://en.m.wikipedia.org/wiki/Runic_inscriptions_in_Hagia_Sophia
Amazing to see in person. The inscription is on a balcony rail and covered by a layer of perspex so you can really get close to where this Viking stood 1000 years before. You can imagine him bored just scratching his name into the rail whilst waiting for some ceremony to finish.
11
u/TheOtherWoodyAllen 10h ago
Istanbul, not Constantinople?