The spelling of the word "Artis" can be a bit confusing. The word is pronounced /ˈɑːrtɪs/, with the emphasis on the first syllable. It is spelled with an "s" at the end, despite the fact that it sounds like it ends in a "z" sound. This is because the letter "s" is often used to represent the "z" sound in plural nouns or words deriving from Greek or Latin roots. So although it may seem counterintuitive, "Artis" is spelled correctly with an "s" at the end.