There is runic Old Norse graffiti in the Hagia Sophia that probably originally said something along the lines of 'so-and-so wrote this': https://en.wikipedia.or

There is runic Old Norse graffiti in the Hagia Sophia that probably originally said something along the lines of 'so-and-so wrote this': https://en.wikipedia.org/wiki/Runic_inscriptions_in_Hagia_Sophia https://en.wikipedia.org/wiki/Runic_inscriptions_in_Hagia_So...