EU4: The Holy Roman Empire Guide (Mechanics Explained)

In the Europa Universalis IV, the Holy Roman Empire mechanics have been completely overhauled in the 1.30 Emperor update and DLC.

This article will explore the new HRE mechanics added in the update:

59 Princes in the Holy Roman Empire

The HRE screen now shows 59 princes within the Holy Roman Empire, including 12 free cities. The number of free cities can increase, and we will discuss how to do that in a moment. On the left side of the screen, we have the electors, which start off with the classic seven electors, but we can also get one more.

Reform Screen

Holy Roman Empire Screen
Holy Roman Empire Screen

The reform screen has been changed, and now we have a new system of decentralization or centralization from the empire. Both give a different path that you can take as the Emperor, which will affect the Holy Roman Empire drastically.

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Decentralization and Centralization Paths

When you first start off, you have to do the classical reforms such as the call for rights reform, then institute a rights regiment, absolute rights stability at which now gives you a state maintenance – 25 percent. Afterward, we start getting a few different reforms such as the perpetual diet, which gives Imperial Authority from free cities by 50 percent.

Decentralization Path

Decentralization and Centralization Paths
Decentralization and Centralization Paths

Once you have enacted the perpetual diet, you can choose between decentralizing or centralizing your empire. If you choose to decentralize, you require the perpetual diet. The first decentralization reform grants you three more free cities within the Empire.

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Centralization Path

If you go down the centralization path, you get a core creation cost reduction of minus 10%. Afterward, by curtailing the Imperial estates, you get Imperial Authority growth modifier plus 25%. Proclaiming herb Kaiser tune gives you another imperial growth plus 25%.

Revoking the Privilege

Revoking the Privilege
Revoking the Privilege

Revoking the privilege means that all of the HRE members will be your direct vassals, or they have to leave the Empire, and you get a claim on them. Princes and free cities also get a stability cost modifier minus five percent. You also get another 25 percent Imperial Authority growth.

Imperial Incidents

The Emperor DLC also adds imperial incidents, such as the Burgundian inheritance, Shadow Kingdom, or many others that you will encounter in your game. You get three different options that lead to three different outcomes.

You need to make sure to care about what our princes are saying since they also vote for which of these options we should go for.

Imperial Incident
Imperial Incident

Canceling Reforms

You can also cancel the reforms that have already been enacted. That means if you want to cancel some decentralization reforms and go down the other path, you can always do that as long as you have 50 Imperial Authority for each reform. Your past incidents are going to be shown on the screen as well.


In conclusion, the HRE mechanics in the Europa Universalis IV video game have been completely changed in the 1.30 Emperor update and DLC. With this article, we hope to have provided a clear understanding of the new mechanics and how to navigate them effectively.


  • Matthew Flores

    Matthew Flores plays games for a living... what a life! He began with World of Warcraft when he was just a young man; nowadays, he has evolved to play every genre—grand strategies, RPGs, shooters, MMOs, and everything else! With this being his passion, he dreams of sharing his 1000s of hours of knowledge and expertise with others by creating YourGlobalGamer.

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