1 May 1997:  Rosslyn Chapel was constructed by Sir William St. Clair, 11th Baron of Rosslyn, 3rd Prince of Orkney, beginning in 1446.  

Some claim that St. Clair built the chapel to honor his grandfather's (Sir Henry St. Clair, 9th Baron of Rosslyn, 1st Prince of Orkney) voyage to North America in 1398, almost one hundred years BEFORE Columbus' voyage of "discovery."

Part of their "proof" for this claim is that some of the carvings in the interior of the chapel are of things known in  mid-fifteenth-century Scotland only because of Prince Henry's voyage 48 years before the construction of the chapel and 46 years before Columbus could have provided this knowledge.