I guess that many and varied have been the paper models featuring the iconic building. This particular one was published by Editoriale Domus, Italy, 1983. Scale is 1:150 and it weighs in at a height of 43cm.
It's partly die-cut, which was both a blessing and a curse. A blessing because I didn't have to cut out all those arches by hand. A curse because it suffered from the same faults as all die-cut models do to some extent. One page of parts suggested that the printer and the die-cutter had had a terrible row the night before. But with a building that is basically white all over this wasn't too visible, thank goodness.
Official website;
Opera della Primaziale Pisana: sito ufficiale