A sword, made in Germany around 1250 - 1330 but found in Lincolnshire, England in the 1800s, has baffled experts at the British Library in London, UK.
So they've put it on display and asked for the public's help.
All the public has to do is work out what the letters and symbols inscribed on it might mean. Here they are.
+NDXOXCHWDRGHDXORVI+
https://www.rt.com/uk/312203-lost-sword-mystery-inscription/
You can see some people's suggestions at the Library's twitter feed:
https://mobile.twitter.com/britishlibrary/status/631119425622642689
So they've put it on display and asked for the public's help.
All the public has to do is work out what the letters and symbols inscribed on it might mean. Here they are.
+NDXOXCHWDRGHDXORVI+
https://www.rt.com/uk/312203-lost-sword-mystery-inscription/
You can see some people's suggestions at the Library's twitter feed:
https://mobile.twitter.com/britishlibrary/status/631119425622642689