Standing on the mountain above Caerphilly, one may reflect upon the gap where once stood Llanbradach Viaduct, and look near at hand upon the restored ruins of Caerphilly Castle; man labours to rebuild the mediaeval whilst he ruthlessly scraps the modern.
Source: wiktionary
The earliest known example of a partial rider is the Talia (meaning scout) which occurs in the Great Chess of Timur. It is a transition piece between the mediaeval alfil and the modern bishop, able to move like the bishop without being blocked by a pawn standing in front of it.
Source: wiktionary