I had never been to Prague. I was extremely fortunate to have Katerian as my guide. She deserves the five stars (or more) for her professionalism and personality. She has an infectuous enthusiasm in the way she talks and describes the city. She is highly knowledgeable and articulate. I have had many, many guides in my (long) life. I would rank her definitely in the top five. I was enriched by the visit to Prague and by meeting Katerina.