Complex sentence: He became a Benedictine around 1380, and the portrait of him in the "Squarcialupi Codex" shows him in a Benedictine black cassock; and on March 8,1401, he took the post of abbot at S. Martin al Pino.
Split into simpler sentences: He became a Benedictine around 1380, and the portrait of him in the "Squarcialupi Codex" shows him in a Benedictine black cassock. On March 8,1401 he took the post of abbot at S. Martin al Pino.