https://forum.paradoxplaza.com/forum/developer-diary/dev-diary-180-how-a-crown-is-earned.1856175/
180 - How a Crown Is Earned (Coronation Activity)
Previous Dev Diary >>2123520 (Progress updates for Celestial/SEA/Administrative)

Coronations
>holding one changes your Coronation "law" to its new status
>costs 355 in 1169 for the King of Scotland
>4 Intents - Legitimacy/magnificence, prestige/special relations, harming Detractors, endow Coronations/artifacts
>otherwise just your standard activity, but with new events that seem to have some politics involved; seems to be what Royal Court should have been
>can crown self, if not an Anointment (allegedly common in Iberia)
>feast afterwards and rewards are given based on magnificence

Guests
>6 intents - show up, offer support, advocate for your realm, demand a hook or contract improvement, steal shit, swell faction discontent/reduce magnificence

Oaths
>can take an oath to be accomplished within a time period
>there's ~16 variants, 9 shown were - secure Alliances, Ensure Peace, Greatest Hunter, Provide for Warriors, Provide for Poor, Expand Realm, Shape the Realm, Install Claimants, Provide for Faithful