Medieval Dublin is hard to extract from wandering the commercial city today. See medieval Dublin information at enfo.ie/leaflets/bs16.htm. Its history is at eiretek.org/chapters/books/Harris/contents.
Aim for the Guinness. This famous stout was first brewed as a "porter" by Arthur Guinness in 1770 at St. James' Gate here, see ://www.guinness-storehouse.com/en/somehistory.aspx/ Now centered in England, you can still enjoy the Guinness Book of World Records, instituted to while away the time while patrons imbibed. See ://spyhunter007.com/spy_guinness_book_history.htm