Time for a (short) history lesson! (The teacher in me just can't resist, although I taught English and Art, not History.)
This depiction is of the English coronation throne, also called King Edward's chair, in use since 1308. It was used to crown Elizabeth II (although I'm not sure whether or not she used a copy of the chair - different articles from Wikipedia make this unclear.) Also, every time a coronation occurs, the Stone of Scone, first mentioned in the 14th century, is brought from its home in Scotland and put underneath the throne, which was built to hold it. I love my British heritage.
The Stone of Scone:
Have a regal week.
P.S. I'm having connectivity problems, so if I don't get to your site to comment on your inchie, please forgive me.