What nationality was the man who determined that light has a finite speed?
Rømer's determination of the speed of light:  The discovery is usually attributed to Danish astronomer Ole Rømer (1644–1710), who was working at the Royal Observatory in Paris at the time. Ole Rømer: Ole Christensen Rømer (] ; 25 September 1644 – 19 September 1710) was a Danish astronomer who in 1676 made the first quantitative measurements of the speed of light.
i don't know