A network built from marriages in the game grouped by dynasty. This is the largest network in the game, there are a number of other smaller networks (<10 nodes) that are not connected to this one.
The network is colored by the culture of the node which is taken from the save file. This is set when the dynasty is founded and does not change during the game. Nodes represent dynasties and vertices represent a marriage between two dynasties. Nodes are sized by PageRank; larger nodes are more popular and are connected ("married") to more popular nodes.
India is at the top right of the network and Europe is at the bottom left in two clusters. The bottom cluster includes most of Europe while Italy forms a cluster of its own above it. The large cluster above this is Greece and Byzantium which converted to Islam early in the game. Scattered about the centre are the pagan dynasties of Eastern Europe and the Mongols. On the far right is Spain and a much smaller cluster coming off this for West Africa. Spain connects to a large North African\Egyptian cluster and India connects to a large Middle Eastern cluster.
Hover over a node to get its name, culture and religion or click on a node to see its ego network. Due to the size of this network it can take a while longer to load or zoom in on.