The last decade of the 17th century (the 1690s) ran from January 1, 1690, to December 31, 1699. Events and trends Thomas Neale designed the roundabout of Seven Dials. 1692: The Salem Witchcraft Trials were held in Massachusetts Bay Colony. 1692: Dutch Explorer Arnout Vielle discovered the first known European-American trade route down the Ohio Valley. The New York Colony financed this route, and it became profitable. World leaders King Christian V of Denmark (1670–1699). King Frederick IV… (More on 1690s)