Before the new SEC-mandated rules, marketmakers would often let limit orders pile up unexecuted unless the market rose or dropped to a point where they could get their accustomed spread.
Through his unexecuted project for the facade, a little known study for the tombs of Medici popes Clement VII and Leo X, and studies for the Laurentian Library, Michelangelo transformed himself from a painter and sculptor into an architect.