“They despise my novelty,” wrote the Neoclassical artist Giovanni Battista Piranesi, “I their cowardly conservatism.” On the 300th anniversary of the Venetian artist’s birth, the British Museum displays its complete collection of his drawings. The exhibition celebrates Piranesi’s forward-thinking, modernist approach through the medium that laid the groundwork for his legacy as a printmaker: his work as a draughtsman. —J.V.