Am looking for any history about architects that worked on St Petersburg Palace

Question:

Am looking for any history about architects that worked on St Petersburg Palace around about 1860?

The name that I have is Giles Soper but I have no idea of his exact role in the works.

Best Answer - Chosen by Asker: The palace probably has an archive department - with all the original documents, an archivist will be able to help you.

Employ a professonal researcher in Russia to do it for you

you may get copies of something with his original handwriting on it.