Nagoya
proper noun
The place that's famous for old roofs. I don't know why, but it's the city of Nagoya. Just associate the two things together and it'll be hard to forget (so long as you've heard of Nagoya before - if not, read up about it!).
Like many place names, the reading here is a little messy. 名 uses its kun'yomi な, 古 uses its on'yomi こ, but rendaku'd to ご, and 屋 uses its its kun'yomi や. Pretty complicated, but if you know the meaning of this word is Nagoya, then you'll know the reading is なごや too — no need to overthink things.
私の友人は名古屋でデザイナーをしています。
My friend is a designer in Nagoya.
名古屋の朝ごはん文化は全国で有名です。
The breakfast culture in Nagoya is famous all over the country.
名古屋市内で一番高いビルはどれですか？
Which is the highest building in Nagoya City?