In the second floor of Hagia Sophia Mosk which is located in Istanbul , there is a quite weird writing in old viking language. First people thought it was just a crack on the marble. However with the help of some historical lingiuists the mystery of this solved.
Halfdan was here
Well through the entire history Hagia Sophia has been always considered as one of the most gallant way to do religious devotions. However nobody noticed this old school grafitty for years and they thought there are just natural cracks.
However after the research examiners understood that this was old viking writing and the story is quite interesting. In the 9th Century when viking commander halvdan was visiting Hagia Sophia he was mesmerized by the beauty and fabric of this place and decided to create a permenant mark of his. In the grafitti it says " Halvdan was here" . Well It seems like this commander halvdan was quite a trend setter dude and it was quite mysterious for the history of this place of worship.
Who is Halvdan ?
Well there was a tribe living in a place called Lotofen and these islands were connected to norway but they were only 200km away from the Artic Circle. The tribes name was Olav Tvennubrini and their commander was our famous grafitti artist Halvdan. He was young and fearless soldier.
Vikings used to call the biggest city they know as Miklagard . Well when we consider the circumstances of that time their Miklagard was Istanbul. When they are wandering around the streets of Istanbul Halvdan was mesmerized by the crowd in the streets and Bazaars and eventually he wanted to visit famous Hagia Sophia.
Well Hagia Sophia was not a touristic place at that time , therefore only way him to visit that amazing place was to join the prayer. Well I think he got pretty bored because they were from different religion and in the middle of the prayer he decided to write this grafitti with his huntsman knife.
Well ofcourse what did he write ? There is nothing more satisfying then carving your name around in the places beware of Halvdan "He was here and he will be always there"
Source: 1