A symbol better associated with 21st Century social media has been discovered at an ancient archeological site.
The weird "hashtag-like" symbol was found carved into a ceramic slab in the rural area Cobankale, in the north-western Turkish province of Yalova.
Boffins believe the item was made by the Byzantine Empire over 700 years ago, but the symbol's origins may be even older than that.
Today the hashtag symbol is used on Twitter and other social networking sites to tag common topics, but examples of it being used dating as far back as 1850.
It's believed the humble hashtag can trace its creation even further, to ancient Rome, as an abbreviation for the latin 'libra pondo' or pound weight.
Scientists believe the symbol on the ceramic slab, was made in the late Byzantine era in the 13th Century before the fall of the empire.
A team of experts, led by Professor Selcuk Seckin, has been carrying out digs at the site for the past three years.
They have also found bone fragments, ceramic objects and iron tools during that time.
The area was the scene of the Battle of Bapheus on 17th July 1302 between an Ottoman army under Osman I and a Byzantine army under George Mouzalon.
The battle ended in a crucial Ottoman victory, cementing the Ottoman state and marking the final capture of Byzantine Bithynia by the Turks.
The Byzantine Empire, which covers most of modern-day Turkey finally fell by 1453.
This is not the first time a hashtag has been found by eagle-eyed archaeologists.
Last year, boffins reportedly found a 73,000-year-old 'hashtag' sign in a cave painting in South Africa.