The characterization of aromaticity by conjugated circuits model has been introduced by M. Randić more than 30 years ago (M. Randic, J. Amer. Chem. Soc. 99 (1977) 444). The three Kekulé valence structures of naphthalene and their decomposition in conjugated circuits are shown over an older copy of Linus Pauling’s drawing of 42 canonical structures contributing to the normal state of the naphthalene molecule.