7 June 1966: Death of Hans Arp. Hans Peter Wilhelm Arp, known as Jean Arp, was a prominent German-French sculptor, painter, and poet associated with the Dada and abstract art movements. He spent his final years in Basel, where he died. See wikipedia for more information.

7 June 1879: Inauguration of the Wettstein Bridge. After more than a year and a half of construction, the Wettstein Bridge was opened. It was the third bridge in Basel, after the old Rhine bridge and the railway bridge (1874), and the first modern bridge for general traffic. See wikipedia for more information.