Answer: Pavia, kinds, pictures and Prague.
Explanation: a noun is a word or a group of words that denotes a place, a person or an object. In the given sentence "Pavia" is a proper noun that denotes a person, "kinds" and "pictures" are common nouns (also the phrase "kinds of pictures" is a noun clause) and "Prague" is a proper noun that denotes a place. The rest of the sentence is formed by "took" that is the verb, "many" that is an adjective and "of" and "in" that are prepositions.
