Connection symbols sit below a country involved. Hover or focus for the countries and dates; click for details. Click a region heading to fold its rows.
Year
Time runs down the page; swipe sideways for more monarchies. Tap any mark for details.
BarsPeriod of monarchyRuling house, named on the bar (colours repeat, even side by side; read the name or select the bar)
LinesShared rule (sometimes interrupted)Union or continuationDivision, conquest or end
SymbolsUnionState unionContinuityPartitionConquest or dissolutionRestorationReorganization
ReignsRuler, with a line spanning the reignMajor ruler, labelledMonarchy that still exists
Bars show periods of monarchy, colours show ruling houses, and dots show rulers.