An image of half a leg on a church wall? A little bit of a random question here - I was at a christening this Sunday just gone and on the wall was an image of half a leg with a passage underneath it (not sure what it said) and I don't have a clue what the whole thing meant.

I've tried Googling about it but got nothing remotely close.

Is it something multiple churches have or could it of been specific to that one church?

-- Added Location --

It's a Roman Catholic Church. The location is St Johns Church in Bridgnorth, United Kingdom - Website
It is very likely what you were seeing was a picture of a relic. 

From Wikipedia: 


  "A relic usually consists of the physical remains of a saint or the
  personal effects of the saint or venerated person preserved for
  purposes of veneration as a tangible memorial."


If you think seeing a picture of a limb is odd, then you would be really taken back by some churches that actually have a physical leg, or right forearm, or even the skull of a saint on display in a reliquary (a fancy glass display box). The passage beneath the picture likely included the name of the person being venerated.

Reliquary and skull of Saint Ivo of Kermartin (St. Yves or St. Ives), (1253–1303) in Tréguier, Brittany, France: