Important Note: This patch introduces a substantial change to gameplay, namely that universities and temples now need to be built on top of a Building Site (similar to how it works for town halls and settlement sites). The intent is to gradually make more buildings have similar requirements.
----------------------------------------------------------------------- - 5.3.0 Changelog-----------------------------------------------------------------------
* AI
- The AI will now declare war on a player if it has a quest to own a settlement possessed by that player.
- The AI will now continuously check if it can build a town hall in the desired settlement if it has a quest to own a given settlement.
- The AI will now only build town halls on settlements with territory adjacent to their own. It will still build a town hall on a quest objective settlement, even if it is farther away.
- The AI can now transport workers to other landmasses to build settlements.
- The AI will now (if it is at peace) declare war on one of its neighbors if it has a great military advantage over them (in the Scenario mode).

* Buildings
- Temples and universities can now only be built on top of "Building Site" locations.
- Building sites, mineral deposits and the like now display to which settlement's territory they belong in their tooltip.

* Factions
- Added Norse raven flag icons (by Jinn), and updated some Norse factions to use them as their icons.

* Heroes
- Fixed issue which caused custom heroes items which were saved as equipped to start out unequipped when using them in a game.

* Items
- Added the "Rusty" magic prefix for armor (-1 armor).

* Maps
- Updated Earth map settlement territories so that less settlements have territory on both sides of a major river.
- Added the Baltic Route Network route terrain feature to the Earth map.

* Miscellaneous
- The current year now changes more quickly in earlier eras.
- Added new border graphics (by Jinn).
- Fixed issue with textures not being reset properly when changing the scale mode without restarting.
- Borders being shown on water is now optional (off by default).
- If the preferences file cannot be parsed, then the default values for the preferences are used, instead of the game exiting.

* Quests
- Fixed issue which caused the initial dialogue to not trigger properly for the Mead of Wisdom legacy quest.
- Added side-quests for Denmark and Sweden to conquer areas in Scandinavia and around the Baltic.
- Added side-quests for the Swedish Tribe and Sweden, for certain Swedish real-world festivities (e.g. Gustavus Adolphus Day). These only trigger when it is the corresponding day in the real world.
- Added side-quests for Denmark related to Danish historical serfdom laws.

* Scenarios
- Kobolds now spawn at longer intervals in the Nidavellir scenarios.

* Status Effects
- The duration of harmful status effect is now reduced semi-randomly depending on the levels of the caster and the target (if both are organic units).

* Upgrades
- Added the Monarchy government type upgrade (-25% cavalry cost) (only available for polities) (icon by Brullov).
- Added the Republic government type upgrade (+10% Copper/Silver/Gold processing bonus) (only available for polities) (icon by Brullov).

* User Interface
- Increased the width of the map dropdown for the custom game menu, as some map names were too long for it.
- Items sold at the market now have a colored border if they are magic or unique.
- Reworked the achievement unlocked dialog.
- Reworked the dialog for most dialogues.