Among the many mind boggling things to contemplate is the fact that the Russian aristocracy didn’t just have one enormous and opulently decorated and designed palace. They had several of them; each one elaborate and ornate. In fact Catherine actually put a halt to all the gold being used to decorate her palace that had begun by order of her predecessor, Empress Elizabeth. 

Here, below, are some photos of Catherine’s Palace located in Pushkin, not far from St Petersburg. Please note that while some photos link to Evocative Photos for licensing, photos taken inside the palace may not be used for this purpose, so they are not linked. 
JFB