It was most recently worn at the State Opening of the Duma in 1906.

Where can I find information on the State Opening of Parliament?

Judgment could not be given between the summoning of a Parliament and the State Opening.

In 2013, she attended the State Opening of Parliament for the first time.

The State Opening is a lavish ceremony of several parts:

There is a ceremony similar to the State Opening, but much less well-known.

It is also worn for the State Opening of Parliament.

Can you identify any special items used in the State Opening of Parliament ceremony?

Have a look at this page on the State Opening of Parliament for more information.

Wells later described the State Opening of the new 1906 parliament: