"In January 1969, as Umber-to Eco tells us, the International Association for Semiotic studies decided during the conferen-ce in Iris that the word "semiotics" was to be used as a na-me of the studies of meanings, of which linguistic semantics is only one part. Since I since decaaes have interested my-self in the stuay of architectural meanings, I read the Swe-dish edition of Eco's book "La struttura assente" with the greatest interest. I found, however, that I couldn't always agree with Mr Eco, and since he introductorily explained that his Introduction was just an attempt and that discussions about his thesis would be welcome I am hereby forwarding some critical remarks in the hope that it might bring the study of semiotics a step further."