Admittedly,the quality is not excellent, but the subject matter is. This cat apparently has (or, at the time, had) the run of the Peter and Paul Cathedral, where the tsars of Russia from Peter the Great onwards are buried.
I also learned from a television report that there are cats at the Hermitage Museum, where their job is to keep the magnificent former royal place and its surrounds free of rats and mice.
* I added the word Russia because I’ve also been to St Petersburg in Miami, US, which is kind of historic, too.