[rjsw]

Britain (technically England) has prosecuted a monarch [1].

[1] https://en.wikipedia.org/wiki/Charles_I_of_England

[cherry_tree]

>Charles was tried, convicted, and executed for high treason in January 1649. The monarchy was abolished and the Commonwealth of England was established as a republic. The monarchy was restored in 1660, with Charles's son Charles II as king.

lol and immediately restored the monarchy with his son