A 67-year-old Newark man was taken to hospital after he was mugged outside Lincoln Cathedral.
The victim was on Minster Yard near to the arch facing the cathedral at around 4.50pm on Friday, March 20 when a man approached him, pushing him to the ground and stealing his wallet.
It is believed the offender ran off down Steep Hill following the incident. The wallet was later recovered.
The offender is described as a tall white man who spoke with an English accent, wearing a dark hooded top and glasses, with a long sharpe nose, short brown hair, and thought to be aged in his late 20s to early 30s.
The victim was not seriously injured in the incident and was taken to Lincoln County Hospital for treatment.
Police say he has since been released and is now recovering at home.
Officers investigating the incident have issued an appeal for witnesses to the robbery.
They want to hear from anyone who may have been in the area at the time and witnessed anyone matching the description, or seen anything suspicious.
Anyone with any information is asked to contact Lincolnshire Police on 101 quoting incident 305 of March 20.
Alternatively, people can contact the independent charity Crimestoppers anonymously on 0800 555 111.