This wonderful hotel is very close by the cathedral, Leonidas & behind Butter on the left. Use Naver and Kakao Map to help you navigate. It's located on the 17th floor. The hotel is surprisingly quiet unless you decide to open the window.
Staff is wonderful. Hotel is clean and it has all the amenities you need. Historical sites are walkable.
Bring cash to take advantage of the food carts. Would stay again.