This is the sundial on the wall of the quaint St. Peters Church in Carmarthen (Welsh: Caerfyrddin) in Carmarthenshire, Wales.
I saw it up on the wall and thought that would make a nice shot but now looking at it something dawned on me. It's not horizontal, It's vertical on a wall!
Had I seen this before? I must have surely but it's something I had never given a thought to before. How the heck does that work then? So off to Wikipedia to learn more.
Well, there's plenty of interesting information on sundials. Isn't it strange that there is so much more to a subject than you ever could imagine.
Even for horizontal sundials, I just thought to get a disc, divide into equal parts and voilà a sundial! but oh no, "To be accurate, such a sundial must have been designed for the local geographical latitude and its style (The bit that sticks up and casts the shadow) must be parallel to the Earth's rotational axis; the style must be aligned with true North and its height (its angle with the horizontal) must equal the local latitude." Thanks Wiki.
Vertical sundials are even more complicated. Well, that's an hour I won't be getting back, very interesting though and I will never look at a Sundial the same again.
I did not note down the axis of this wall but now I know from looking at the face of the dial that it is a South Facing wall. (If only you could see the smug look on my face now).