@article{rosenthal1973invention, author = {Rosenthal, Earl}, interhash = {353550e25efd84c7d4c9bc51fc671095}, intrahash = {bdc3537f9d98c6fd61562336fbd3bba8}, journal = {Journal of the Warburg and Courtauld Institutes}, pages = {198-230}, title = {The Invention of the Columnar Device of Emperor Charles V at the Court of Burgundy in Flanders in 1516}, volume = 36, year = 1973 } @article{rosenthal1971ultra, author = {Rosenthal, Earl}, interhash = {7f5f18ec222b203451971d7b8b99b5f1}, intrahash = {7bb77fb29f01c59b5b6cc40e2cd6cb30}, journal = {Journal of the Warburg and Courtauld Institutes}, pages = {204-228}, title = {Plus ultra, non plus ultra, and the Columnar Device of Emperor Charles V}, volume = 34, year = 1971 }