Architecture:
- Added Architect as a new artist.
- Introduced Architectural Splendour, an equivalent to different cultural traditions, but more valuable (and very rare). Architectural Splendour will not be generated per year, it only will be added with buildings, events or JEs.
- Added Architecture School as a PM for Art Academies (works for Architects like Conservatories for Composers etc.).
- Independent Architects can be hired freely. You only need the Urban Planning Tech to do so.
- Architects can go on a study trip and learn a new trait and gain experience.
- Architects can expand the capital in four stages with special modifiers.
- Experienced architects can write a treatise on architecture.
- With urban planning, architects can improve urban centers.
- Architects can have these different styles as character traits: traditional, historicist, bauhaus, neoclassical, art deco.
- Like Bauhaus before, Neoclassical and Art Deco schools are available. This is a requirement for end game architecture.
- Neoclassical and Bauhaus Capitals are now possible like Art Deco as an "end game" architecture style for your capital/country. However, Art Deco takes longer and is more valuable.
- Neoclassical, Bauhaus and Art Deco capital get a standard of living bonus and migration pull.

Architectural Blueprints:
- Architects can develop up to fifteen different blueprints for specific buildings.
- Special blueprint buildings can be built once.
- Blueprint buildings are divided into five categories. However, only one building from each category can be located in each state. For example, City Park, Luna Park, and Parade Ground all belong to the "Public Square" category. If a City Park already exists in the state, then Luna Park cannot also be located there.
- Blueprint buildings have various requirements. They must first be designed by an architect. This often requires prior technology. Certain laws may also be required (no Alsmhouse without basic social security).
- Due to the time required for research and the limitations of categories, it is wise to consider beforehand which blueprint research to invest in.

Monuments:
- Great Architects can research an unique Costum Monument Blueprint (An Architect's Masterpiece).
- Costum Monument Blueprint depend on the architectural style of a Great Architect. Bauhaus Archichtets will design the People's Forum, Art Deco Architects the People's Monument, Neoclassical Architects the People's Palace.
- Only one Custom Monument allowed per game.
- Vienna's Ringstrasse has been removed as a monument. Some of the events take place during the capital's expansion. Austria will have some special Vienna Ringstrasse events when the capital is Vienna.

Architecture Changes:
- Architects, not engineers, give a bonus when building monuments.
- Splendid Architecture is now called "Architectural Splendour".
- For the Biennale, not only the experience values of composers, writers and painters are combined to determine the winner country, but also the experience of your architect. The winner also gets Architectural Splendour.
- Gaudí and Antonelli are no longer engineers, but architects.
- Changed Architecture event icon.
- Art Deco Cinema, Art Deco Office, Art Deco Airport and Art Deco Skyscraper are no longer Journal Entries, but random events when building your dream of Art Deco, if the triggers are met.
- The JE "Art Nouveau Quarter" will be available only once.

Artists:
- Added Artist Game Rule to start with a random artist (equivalent to Academic Game Rule to start with a random academic)

Academics:
- Added Chemist, Geologist and Physician to the buy academic diplomatic action.

Anthropology:
- Heidelberg Man added as a possible human fossil.

Achievements:
- Stalin Is Green With Envy: Own the People's Palace as a council republic with command economy.

Aeronautics:
- Requirements for Pilot School changed: An Ace, NCO training Tech and an Airfield are needed.
- Higher chance to rescue Zeppelin Pilot after a disaster (from 65% to 80%)

GFX:
- Added 4 new loading screens about Scientific Expeditions.
- Changed a lot of invention icons, event icons, concept icons, and MR icons which fit the Vic3 style better.

Fixes:
- Gaudì is now Gaudí.
- Fixed some events with not fitting event icons (music instead of architecture).
- Fixed the progress bar of the engineer.
- The Plague Treatment journal entry now adds the treatment of plague instead of scarlet when finished. This should solve a weird exploit to get infinite medical prestige.
- If you replace an existing physician with a new one, the new one will be buisy if the old one was working on a project.
- The Button to stop Naturalist projects now also stops the Botanical expedition.

Changes:
- Removed MFE_trade_good_events.2 and MFE_trade_good_events.3, as trade routes can no longer be created.
- Gave the Engineer Trait a positive modifier for manufacturing throughput if they are executives.

Balancing:
- Establishing a Nature Preserve now requires less construction points.

Internal:
- Renamed various files
- Renamed various triggers, variables, sGUIs, etc. (e.g. gaudi_engineer_var --> tesla_engineer_var)
- Reworked some Academics and Artists achievements to use flags instead of custom_locs.
- Removed various scripted_buttons that were used for the AI and either switched them to sGUIs or scripted_effects.

Characters:
- Adolf Loos (random Austrian Architect)
- Walter Gropius (random German Architect)
- Gottfried Semper (random German Architect)
- Mies van der Rohe (random German Architect)
- Charles Rennie Mackintosh (random Scottish Architect)
- Melchior Berri (randoms Swiss Architect)
- Hannes Meyer (randoms Swiss Architect)
- Ferdinand Stadler (randoms Swiss Architect)
- Hans Conrad Stadler (randoms Swiss Architect)
- Jakob Friedrich Studer (randoms Swiss Architect)
- Louise Blanchard Bethune (random American Architect)
- Cornelis Dopper (random Dutch Composer)
- Marie Skłodowska Curie (random Polish Chemist)
- Removed Edison (makes more sense as an executive, he didn't invent a lot anyways)
- Removed Isambard Kingdom Brunel (now in Vanilla)

Hotfix 2.3.9f "Bahmut"

Fixes:
- Re-added the "identify (Human) Fossil" button for the Anthropologist.

Hotfix 2.3.9e "Bahmut"

Fixes:
- Fixed the progress bar of the engineer.
- The Plague Treatment journal entry now adds the treatment of plague instead of scarlet when finished. This should solve a weird exploit to get infinite medical prestige.

Diseases:
Removed the sound effect from the diseases and reduced the intensity of the graphical effects.

Hotfix 2.3.9d "Bahmut"

- This fix deals with other errors concerning translation/localization and GUI.

Hotfix 2.3.9c "Bahmut"

- This fixes some localization issues/problems with buttons in the GUI, too.

Hotfix 2.3.9b "Bahmut"

- This fixes some localization issues/problems with buttons in the GUI.

Changelog for 2.3.9 "Bahmut"

GUI:
- Complete Rework of the GUI thanks to Bahmut from the Manaflow Mod.

Tutorial:
- Added a Tutorial that you can access by clicking a button on the Morgenröte Objective Start Screen.

Loading Screens:
- Complete Rework of the Loading Screens. They now represent the Academics, Artists and Athletes.

Hotfix 2.3.8b "Flammarion"

Visual:

- Added a new Trilobite Map Table Object.
- Added a new Battenberg Cake Map Table Object.
- Added a new Old Fashioned Map Table Object.
- Added a new Cucumber Ice Cream Map Table Object.
- Added a new Croissant and Hot Chocolate Map Table Object.
- Added the Buddha of Bamiyan as a 3D model to the map.
- Improved the Boater Hat (Thanks to Miss Duce).

General:
- Reworked experience gain effects to be less prone to bugs.
- Morgenröte Objectives should now be displayed in front of vanilla objectives.

Fixes:
- The Famous Racer Event should no longer pop up all the time.
- The Archaeologist should hopefully not be busy for eternity anymore.
- Fixed option texts in various Paleontology events.
- Fixed Ralph DePalma.

Changelog for 2.3.8 "Flammarion"

Visual:
- Added a Paleontology inspired Theme (thanks to Bahmut from the Manaflow mod!)
- Added two new geological features to the map: The Steamboat Rock in the USA and the Cliff of Lyme Regis in Southern England.
- Added three Paleontology themed Papermap objects: An Ammonite, a Belemnite and a Coprolite with tools.
- Added a Morgenröte Coin

Paleontology:
- Added two general skeletons: Basilosaurus and Plesiosaurus
- You can now automate the tasks of the Paleontologst

Fixes:
- Various localization fixes.
- Babies and children should no longer criticize books.
- Machu Pichu should no longer exist at game start.
- Fixed the path of a few event pictures.
- New Archaeologists will now stay busy with the project of the last Archaeologist.

Quality of Life:
- Added an alert for establishing Paleontological Teams.

Marian Apparitions:
- Marian Apparitions can happen.
- There are two kinds of Marian Apparitions: Historical and Random Apparitions.
- Historical Apparitions: La Salette, Lourdes, Knock and Fátima. These will always happen in their historical location and will be stronger in the first event.
- Random Apparations may happen in every country which has a state with a stron catholic population.
- First reaction to apparition will set the course of positive or negative events.
- Be aware that not every country can act positively when the Mother of God appears, and others can't act in a negative way. For exmaple, countries with catholicism and state religion will not act against the appartition; and atheistic governments will not welcome her.
- 10 different events may happen when the Virgin appears.

FIFA:
- Added new Sports character coach.
- Added Foundation of the FIFA. Works like IOC or AIACR with special building.
- FIFA is needed to create Football World Cup.
- Every national team has a certain value depending on SOL, Literacy, Petty Bourgeoise Cloud and Football Tradition.
- Additionally, positive traits of a national coach will give a better chance to win. Inspiring traits like charismatic, ambitious etc. will help the team, intimitading traits like wrathful, cruel etc. will hinder the team.
- First World Cup will take place in the country which startet it. Next Worldcups will be random, taking place in countries which have a Football Association.
- Eight Countries with the highest Team Value will be qualified for World Cup. The country with the highest GAME VALUE (Team Value + Coach) will win the World Cup.
- You can change your coach, usurp the FIFA Presidency and start a school sports program, too.

Venus Transit:
- Venus Transit has now its own Scientific Expeditions Button.
- Venus Transit can happen in 1874 and 1882.
- The player will be notified when an expedition is possible.
- Depending on location, an expedition is necessary; when the country is in the zone of a Venus Transit, it can observe it directly. The zones have their own concept (so you can have a look at it).
- 6 possible events when doing an expedition to a country within a Venus Transit Zone. If the expedition is a subject of the country, no negative events will occur.
- Additional events, experience of astronomer and luck will be crucial for the success of the observation. A higher success will give a better modifier after the observation.

Bicycles:
- Bicycle Relay Mobilization Option was added to the Reconnaissance. This is an earlier option before Motorized Infantry. Needs rubber.
- Two events concenring the evolution of the bicycle. Under certain circumstances, a mechanical engineer can invent the safety bicycle.
- JE for Great Bicycle Races (known as Tour de France or Giro d'Italia). Will only trigger if the safety bicycle was invented somewhere.
- After the first race, six different bike race events may appear randomly at irregular intervals.

Basketball:
- Added JE, Event and Modifier for the invention of Basketball.

Artusi:
- Added a possible event for Italy about the Artusi, Italy's most important collection of recipes in this time period and a base for a national cuisine.

Changes:
- When the Papal State forms Italy, it will no longer be known as "Kingdom of Heaven" but "Apostolic Kingdom of Italy", which would be much more historical.
- Moved Hot Air Balloon Reconnaissance Mobiliziation from Reconnaissance to Air Reconnaissance.
- Renamd MR Balloon Reconnassaince Mobilization to Early Balloon Reconaissance to differentiate it more form the Vanilla Balloon Reconnaissance.
- Moved Aircraft Reconaissance Mobilization to Aircraft.

2.3.7a "Marsh"

Fixes:
- Mosasaurus and general bones are now correctly.
- The treament chance now adds the effect of the malaria prevention technology correctly.