Where was Louis XVI's trial?

Answer 1

Not in the sense of modern jurisprudence. A forgone conclusion had been reached that the death of the Monarch was required and a show trial was put on to justify that decision. No presumption of innocence existed. No evidence was presented, and the verdict had been written in advance. No other finding was possible. The charge existed and therefore his guilt was assured and his death was a certainty.

Answer 2

He could only have been found guilty of the lesser included offense of disturbing the peace by the worst Kangaroo Court in a modern civilized country. It was a travesty of justice and there was no available appeal.

Which is beside the point, since France was at war with Austria and Prussia, and he had communicated with both and attempted to escape to their armies. This is treason by any definition.

Answer 3

In the Congiergerie in Paris, which was a prison and had a courtroom as well.

Answer 4

This happened on December 11th, 1792. The definitive verdict was spoken on January 15th, 1793 and he was beheaded on January 21st, 1793.