Complex sentence: In 1967 he was invited to Padua to build "Monument to Dante" in Pontelongo, had one-man exhibitions in Padua and Rome and was a major exhibitor at the "Palazzo Al Valentino" in Torino.
Split into simpler sentences: In 1967 he was invited to Padua to build "Monument to Dante" in Pontelongo. Shortly after that he had two one-man exhibitions in Padua and Rome and was a major exhibitor at the "Palazzo Al Valentino" in Torino.