For me, the most interesting aspect of Rosslyn Chapel is the stone carvings of ears of corn — dated before Columbus made it to America.
Maize
Surrounding a window are carvings of maize or Indian Corn
The presence of this plant carving in the Chapel raises many questions: not only is it an exotic plant but it originates from North America, a country traditionally thought to have been discovered by Columbus in 1492, almost 50 years after Rosslyn Chapel was built. Lucifer
The Knights Templar probably made it to North America and back during the 1300s.
The History Channel had a very interesting show concerning their journey.