KEIL, a very important fortress of Germany, seated
on the banks of the Rhine, built by the French after
a design of marshal Vauban, for the defence of Stras-
burg. It was ceded to the empire in 1697, by the
treaty of Ryswick. The French retook it in 1703,
and it was restored to the empire by the treaty of Re-
stadt. E. Long. 7. 45. N. Lat. 48. 40.