It was "Jan van Eyck" who was a northern European Renaissance artist who was one of the first to paint on wood panels with oil paint, although it should be noted that he was not the only one doing so at the time.
I think what you meant was “How is a bridge and an isthmus alike and different?” A bridge is a manmade feature while a isthmus is not. They both connect two parts of land also. Bridges are commonly used as a way to get over a body of water.