Peacock Throne \Pea"cock` Throne\
A famous throne formerly of the kings of Delhi, India, but
since 1739, when it was carried off by Nadir Shah, held by
the shahs of Persia (now Iran); -- so called from its bearing
a fully expanded peacock's tail done in gems.
[Webster 1913 Suppl.]
2. [metonymically named after the throne on which he sat.]
The office or position of the Shah of Iran; as, to ascend
the Peacock Throne.
[PJC]