of 17th CENTURY philosopher
René Descartes.
The Big Bang Theory Season 12, Episode 10
Pizza dates back to the 16th CENTURY...
The Big Bang Theory Season 4, Episode 9
Should I read you some bawdy
19th CENTURY limericks?
The Big Bang Theory Season 11, Episode 11
...was a third CENTURY Roman priest
who was stoned and beheaded...
The Big Bang Theory Season 3, Episode 15
Bosoms would not have said, "Howdy,"
in the 15th CENTURY.
The Big Bang Theory Season 2, Episode 2