doniago has created a... spirited discussion in sca about changing Corpora law so that same-sex monarchs can sit on the throne. Lots of arguments, all pretty typical of the SCA (i.e., change vs. tradition, historical accuracy vs. "creative" anachronism, heteronormativism vs. 21st century politics, and on and on and on).
One of the arguments, as can be expected, is that it's not period. Others, however, say it is. What say ye? Give us some examples of same-sex ruling pairs in history.