Research Trees

Civilization

  Civics                      Unlocks Town Hall

  Farming                  Unlocks: Farm, Whaet Farm, Granary

  Mining                     Unlocks Metal Mine

  Engineering              Unlocks Lumberyard

  Education                 Unlocks  Library, Town Council, Conclave

  Hospitality               Unlocks Theatre, Pub 

  Economics                Unlocks Market

  Housing                  Unlocks House, Villa, Slum

  Construction              Unlocks Seige Foundry

  Orchards                   Unlocks, Orchards, Apiary

  Refined Civics*             ???

  Refined Administration*   ???

  Refined Housing*        Increase amount of population per house

  Estates                     Unlocks Estates

  Archiving                   Unlocks School, Monastary, Archive

  Entertainment            Unlocks Inn, (Restaruant)

  Refining                    Unlocks Armory

  Seamanship              Unlocks Harbor

  Greater Knowledge      Unlocks University, Gallery, Academy

  Greater Prestige          Unlocks Temples, Monument, Stadium

  Taxes                        Unlocks Tax Office

  Refined Farming*         Increases amount of Food from Farms and Gardens

  Advanced Mining          Unlocks Clay, Marble, and Stone Quarries

  Banking                     Unlocks Banks

  Mansions                    Unlocks Mansions

  Expert Mining               Unlocks (Ventori Iron Mine)

  Forging                        Unlocks Forge

  Animal Herding             Unlocks Stables

Warfare

  Logistics                                 Decreases Mateneince Costs

  Training                                 Unlocks Barracks

  Equiptment                            Unlocks Patchwork Breast, Greaves, Traveling Boots, Cloaks of Scout, soilder, and Journeyman

   Melee Weapons                     Unlocks Spear and Iron Dagger

  Advanced Weaponry                Unlocks Iron Broadsword/Longsword

  Missle Weapons                      Unlocks Slings and Shortbows

  Advanced Missle Weapons        Unlocks Crossbow

  Expert Missle Weapons            Unlocks Longbow

  Refined Missle Weapons*        Increases Power of Missle Weapons

  Light Armor                            Unlocks Metal and Wooden Sheild

  Advanced Armor                      Unlocks Leather Armor

  Expert Armor                           Unlocks Plate Armor

  Refined Troops                        ???                  

  Veteran Troops

  Expert Troops

  Elite troops

  Company

  Platoon

  Regiments

  Legion

  Refined Training*                      ???

  City Defenses                           Prerequisite to the Wall Techs

  Hedge Wall                              Unlocks Hedge Wall

  Wooden Wall                            Unlocks Wooden Wall

  Stone Wall                                Unlocks Stone Walls

  Fortress                                    Unlocks Fortress

Magic

  Arcane Research              Unlocks Arcane Laboratory and Band of the Eagle

  Channeling                     Allows Imbuing Essence in champions so they can cast spells

  Enchantment                  Unlocks Band of Might, Agility, Endurance (Enchantment Foundry)

  Spellbooks                     ??? 

  Arcane Analysis               Increases Spell Points stored by 50

  Occult Studies                 (Unlocks Arcane Society)

  Elemental Magic                 Unlocks Tower of Sorcery

  Superior Shard Harvesting     ???

  Refined Shard Harvesting*    ???

  Refined Magic                    Increases Mana Regeneration

Diplomacy

  Negotiations

  Refined Negotiations*

  Bribery

  Refined Bribery*

  Trading

  Advanced Trading

  Treaties

  Economic Treaty

  Research Treaty

  Military Treaty

There is a wiki for stuff like this you know... I've never used it but it exists.

Thanks XeronX, for getting all that info.

I thought I'd just compile the data of of the buildings that I've seen.  Someone who can edit the wiki can copy it over there.  Although I'm guessing a lot of the later buildings will be changed a lot (as they do not provide benefits equal to their cost, and a lot don't seem to even exist at this time either).

Also, iron output is ridiculously low, which makes it nearly impossible to get metal equipped soldiers on the field at this time.

Hut (level 1 outpost or level 2 village): 3 turns, 50 gold, 4 food, 1 tile

- provides housing for 32 population.

House (requires level 3 town): 3 turns, 50 gold, 4 food, 1 tile

- provides housing for 64 population.

Slum (requires level 3 town): 12 turns, 50 gold, 20 materials, 15 food, 4 tiles, -2 prestiege

- provides housing for 200 population.

Villa : requires level 4 city.

Merchant (level 1 outpost): 3 turns, 5 materials, 1 tile

- provides 1 gold income

Market (level 1 outpost): 5 turns, 100 gold, 50 materials, 4 tiles

- provides 8 gold income.

Bazaar (level 3 town): 4 turns, 50 materials, 1 tile

- provides 1 gold income

Workshop (level 1 outpost): 2 turns, 10 gold, 1 slots

- provides 1 materials/turn

Lumberyard (level 1 outpost): 10 turns, 40 gold, 4 slots

- provides 4 materials/turn

Garden (level 1 outpost): 2 turns, 10 gold, 1 material, 1 tile

- provides 3 food.

Farm (level 1 outpost):

- must be built on fertile land

Wheat Farm (level 1 outpost): 3 turns, 50 gold, 5 materials, 4 tiles

- must be built on wild wheat.

Granary (level 1 outpost): 3 turns, 5 materials, 1 tile

+25% to food production of city.

Temple (level 1 outpost): 3 turns, 25 gold, 5 material, 1 tile

- provides 1 prestige

Town Hall (level 2 village): 5 turns, 50 gold, 5 materials, 1 tile.

- provides 2 prestige.

Palace (level 2 village): 16 turns, 100 gold, 20 materials, 4 tiles.

- can only have 1

- provides 5 prestige, 5 gold income

Study (level 1 outpost): 5 turns, 50 gold, 3 material, 1 tile

- provides 1 research

Library (level 3 town): 4 turns, 50 gold, 50 materials, 1 tile

- can no longer produce studies, must make libraries

- provides 2 research

Town Council (level 3 town): 8 turns, 100 gold, 50 materials, 1 tile

- provides 1 research

Metal Mine

- provides 1 iron/turn

Gold Mine

- provides 8 gold/turn

Missile Weapons, horses/cavalry, and siege foundry units don't currently don't exist.