Unlocking buildings

This is a list of what can be upgraded/built at each level.
Level 1
Keep (level 1/5)
Woodcutter (level 1/10)
Stone_quarry (level 1/10)
Castle_gate (level 1/5)
Castle_wall (level 1/5)
Royal_storage (level 1/1) (requires capital)
Imperial Hunting Lodge (level: 1/3)
Campaign Hunting Lodge (level 1)
Level 2
Barracks (level 1/5)
Castle_Tower (level 1/5)
Glass Furnace (level 2)
Level 3
Defense_workshop (level 1/3)
Farmhouse (level 1/10)
Dwelling (level 1/11)
Level 4
Encampment (level 1/3)
Siege_workshop (level 1/3)
Storage (level 1/7)
Woodcutter (level 2/10)
Level 5
Inventory (D)
Signpost (D)
Pillory (D)
Iron_roland (D)
Level 6
Stone_quarry (level 2/10)
Farmhouse (level 2/10)
Dwelling (level 2/11)
Outhouse (D)
Level 7
Tavern (level 1/4)
Guardhouse (level 1/4)
Marketplace (level 1/7)
Cage (D)
Level 8
Barracks (level 2/5)
Woodcutter (level 3/10)
Hideout (level 1/1)
Weapons_rack (D)
Level 9
Stables (level 1/3)
Stone_quarry (level 3/10)
Farmhouse (level 3/10)
Small_well (D)
Nymph_well (D)
Level 10
Storage (level 2/7)
Sawmill (level 1/3)
Bakery (level 1/4)
Dwelling (level 3/11)
Witch_well (D)
Level 11
Castle_wall (level 2/5)
Castle_gate (level 2/5)
Flour_mill (level 1/3)
Stonemason (level 1/3)
Keep (level 2/5)
Town_house (level 1/11)
Town_house (level 2/11)
Town_house (level 3/11)
Level 12
Castle_Tower (level 2/5)
Woodcutter (level 4/10)
Fire_station (level 1/3)
Master_builder (level 1/5)
Hanging_cage (D)
Level 13
Estate (level 1/3)
Watchtower (level 1/2)
Stone_quarry (level 4/10)
Military_hospital (level 1)
Level 14
Barracks (level 3/5)
Farmhouse (level 4/10)
Marketplace (level 2/7)
Carriage (D)
Level 15
Dwelling (level 4/11)
Town_house (level 4/11)
Encampment (level 2/3)
Stables (level 2/3)
Dragon well (D)
Level 16
Defense_workshop (level 2/3)
Woodcutter (level 5/10)
Drill_ground (level 1/2)
Flagpole (D)
Level 17
Siege_workshop (level 2/3)
Stone_quarry (level 5/10)
Level 18
Farmhouse (level 5/10)
Guardhouse (level 2/4)
Storage (level 3/7)
Bakery (level 2/4)
Hero statue (D)
Level 19
Estate (level 2/3)
Dwelling (level 5/11)
Town_house (level 5/11)
Dovecote (D)
Level 20
Barracks (level 4/5)
Tavern (level 2/4)
Woodcutter (level 6/10)
Market_barrows (D)
Level 21
Stone_quarry (level 6/10)
Sawmill (level 2/3)
Marketplace (level 3/7)
Fire_station (level 2/3)
Level 22
Farmhouse (level 6/10)
Flour_mill (level 2/3)
Stonemason (level 2/3)
Gallows (D)
Level 23
Dwelling (level 6/11)
Town_house (level 6/11)
Watchtower (level 2/2)
Level 24
Keep (level 3/5)
Castle_wall (level 3/5)
Castle_gate (level 3/5)
Woodcutter (level 7/10)
Market_stall (D)
Level 25
Castle_Tower (level 3/5)
Stables (level 3/3)
King’s_tree (D)
Level 26
Barracks (level 5/5)
Loot_warehouse (level 1/1)
Stone_quarry (level 7/10)
Sundial (D)
Level 27
Storage (level 4/7)
Marketplace (level 4/7)
Farmhouse (level 7/10)
Bakery (level 3/4)
Level 28
Dwelling (level 7/11)
Town_house (level 7/11)
Theatre (D)
Level 29
Encampment (level 3/3)
Woodcutter (level 8/10)
Drill_ground (level 2/2)
Dry_storage (level 1/3)
Level 30
Stone_quarry (level 8/10)
Tavern (level 3/4)
Charcoal_burner (level 4/10)
Gold_Knight (D)
Ornamental_tree (D)
Level 31
Estate (level 3/3)
Sawmill (level 3/3)
Guardhouse (level 3/4)
Farmhouse (level 8/10)
Level 32
Dwelling (level 8/11)
Town_house (level 8/11)
Park (D)
Charcoal_burner (level 5/10)
Level 33
Flour_mill (level 3/3)
Storage (level 5/7)
Woodcutter (level 9/10)
Fire station (level 3/3)
Level 34
Stone_quarry (level 9/10)
Stonemason (level 3/3)
Charcoal_burner (level 6/10)
Level 35
Marketplace (level 5/7)
Farmhouse (level 9/10)
Jousting_list (D)
Level 36
Dwelling (level 9/11)
Town_house (level 9/11)
Level 37
Moat (level 1/1)
Castle_moat (level 1/1)
Woodcutter (level 10/10) (needs architect)
Level 38
Siege_workshop (level 3/3)
Defense_workshop (level 3/3)
Stone_quarry (level 10/10) (needs architect)
Level 39
Research_tower (level 1/2)
Storage (level 6/7)
Charcoal_burner (level 9/10)
Level 40
Farmhouse (level 10/10)
Bakery (level 4/4)
Festival_square (D)
Level 41
Dwelling (level 10/11)
Town_house (level 10/11)
Dry_storage (level 3/3)
Level 42
Marketplace (level 6/7) (needs architect)
Olive_grove (level 2/10)
Level 43
Guardhouse (level 4/4) (needs architect)
Level 44
Nothing
Level 45
Storage (level 7/7)
Olive_grove (level 3)
Level 46
Dwelling (level 11/11) (needs architect)
Town_house (level 11/11)
Level 47
Research tower (level 2/2)
Level 48
Nothing
Level 49
Marketplace (level 7/7) (needs architect)
Olive_grove (level 5/10)
Level 50
Castle_gate (level 4/5)
Castle_wall (level 4/5)
Level 51
Castle_Tower (level 4/5)
Level 52
Keep (level 4/5)
Castle_park (D)
Level 53
Hunting Lodge (level 1/3)
Level 54
Glass works level: 1
Olive grove level: 7
Level 55
Nothing
Level 56
Olive_grove (level 8/10)
Level 57
Nothing
Level 58
Glass_furnace (level 4/10)
Level 59
Olive_Grove (level 9/10)
Level 60
Glass furnace (level 5/10)
Level 61
Glass_works (level 2/3)
Level 62
Glass_furnace (level 6/10)
Level 63
Olive_grove (level 10/10)
Level 64
Glass _furnace (level 7/10)
Level 65
Tavern (level 4/4)
Level 66
Glass_furnace (level 8/10)
Level 67
Glass_works (level 3/3)
Level 68
Glass_furnace (level 9/10)
Keep (level 5/5)
Level 69
Castle_wall (level 5/5)
Castle_gate (level 5/5)
Level 70
Castle_Tower (level 5/5)
Glass_furnace (level 10/10)
Keep (level 5/5)
Research Tower (level 3/3)