The phrase "sit upon" is often used to describe someone who is in a position of power or authority, as they are said to be "sitting upon" their throne or sitting upon their judgment. However, there are many other synonymous phrases that can be used to convey the same meaning, such as "hold court," "rule over," "preside," "dominate," "govern," and "command." These phrases can be used in a variety of contexts, from politics and business to personal relationships and social situations. By using synonyms for "sit upon," we can add variety and interest to our writing and conversation, while still conveying the same essential meaning.