Hen dechnoleg

Hen dechnoleg ~ Old technology

Dw i ddim yn gwybod faint o weithiau rydw i wedi pasio'r Eglwys Dewi Sant, ond rydw i erioed wedi sylwi'r symbol hwn o'r blaen. Ond heddiw roedd yno.  Mae'n Feincnod o'r Arolwg Ordnans fel yr un ar Blas y Parc. Gwnes i ffeindio fy hun yn tybed roedd faint ohonyn nhw o gwmpas y Ddinas?

I do not know how many times I've passed St David's Church, but I've never noticed this symbol before. But today - there it was. It is a Benchmark of the Ordnance Survey like the one on Park Place. I found myself wondering how many of them were around the City?