Dedicating their lives entirely to prayer, silence and solitude and leaving their cloisters only for medical appointments, the Carmelite nuns may seem to be the antithesis of the modern age.
So when they left the walls of their monastery and ventured into London, what appeared to be seven nuns standing next to the Seven Sisters station sign would have been suprised to become an internet hit.
But the timing was not lost on one commuter, who could not resist taking a photograph which has been widely shared online.
When I realised it definitely wasn't a hen do I decided I had to capture it
The group, which actually numbered eight from Ware Carmelite Monastery, had been to a meeting for enclosed religious orders where they were addressed by Cardinal Vincent Nichols, the Archbishop of Westmister.
It was the first time such a meeting had ever been held, a spokesman for the Diocese of Westminster confirmed.
The nuns were making their way back from the Notting Hill Carmelite Monastery in London to their own in Hertfordshire, in a journey that would have taken them around an hour, when they were spotted.
Sister Fiona, who belongs to the Ware Monastery, said: "They had simply been to an important meeting in London. They are not often out, we go out for medical appointments and that sort of thing, but we do make the exception for an important meetings."
When asked how the nuns felt about their newfound fame, Sister Fiona said: "I don't tend myself to look for publicity, we tend to lead more of a hidden life."
But Ben Patey, 33, couldn't resist taking taking the photograph when he saw what he thought was seven nuns as he travelled home from work.
He said: "I did a double take. It was one of those strange but amusing moments. It is not something you see every day and when I realised it definitely wasn't a hen do I decided I had to capture it."
Founded by hermits in the 13th Century, the Carmelite nuns still live by a set of principles set out more than 500 years ago in a "small community of friends entirely dedicated to prayer, silence and solitude".
There are 15 Carmelite Monasteries in the UK made up of 200 nuns.
They had met on Thursday morning with a group of around 50 sisters from different orders all of whom live enclosed lives seperate from the community.
The group were discussing guidelines about their way of life from Pope Francis issued last year.
Sister Francesca, from Arkley Poor Clares in Barnet, said that the meeting was "wonderfully successful".