Stones........stone masons.........u sit on a seat.............on TOP of it.........a bridge is designed .........so u cross..............by going on TOP of it..........

At Scone, historically, the stone came to be encased in the seat of a royal coronation chair. ... There, at Westminster Abbey in 1307, he had a special throne, called the Coronation Chair, built so that the stone fitted under it. This was to be a symbol that kings of England would be crowned as kings of Scotland also.

Stone of Scone | History & Location | Britannica.com

https://www.britannica.com/topic/Stone-of-Scone