Five of the best… exhibitions this week

Found | Martin Creed | Ori Gersht | Maria Merian | Pablo BronsteinLondon’s Foundling Hospital is a great institution of the Enlightenment. It was started by the 18th-century sea captain Thomas Coram to care for abandoned children, and luminaries such as Handel and Hogarth contributed art to its cause. Coram’s project still inspires creativity today, as this exhibition curated by Cornelia Parker demonstrates. Among the Hogarths here are Tacita Dean, Jarvis Cocker and Jeremy Deller. Co