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Research · Defense
Stonework
Every course laid to hold under the ram — raises troop defense further.
- Entity ID
stonework- Branch
- Defense
- Stat buffed
defense— Defense- Bonus per level
- +1.2%
- Maximum level
- 12
- Bonus at maximum level
- +14.4%
- Power per level
- 72
- Power at maximum level
- 864
- Base study time
- 30 seconds
- Study time at maximum level
- 34m 21s
- Prerequisites
- Fortification at level 5
Cost, time and bonus at every level
Stonework runs to level 12, adding +1.2% to defense and 72 power each time. Studying it out costs the four soft resources — the same amount of each — and takes 34m 21s for the final level alone. Gems are only ever the optional instant finish; the study itself is bought with what your fields already make.
| Level | Total defense | Power | Study time | Each resource | Gems to finish instantly |
|---|---|---|---|---|---|
| 1 | +1.2% | 72 | 1m 55s | 12,000 | 2 |
| 2 | +2.4% | 144 | 2m 30s | 15,600 | 3 |
| 3 | +3.6% | 216 | 3m 14s | 20,280 | 4 |
| 4 | +4.8% | 288 | 4m 13s | 26,364 | 5 |
| 5 | +6% | 360 | 5m 28s | 34,273 | 6 |
| 10 | +12% | 720 | 20m 20s | 127,254 | 21 |
| 12 | +14.4% | 864 | 34m 21s | 215,059 | 35 |
Taken from nothing to level 12 that is 2h 22m of raw study and 891,923 of each of food, wood, stone and iron — 3,567,692 resources in total. Levels above 10 additionally consume an advanced forging material, one more unit per level past the threshold, so the last 2 levels also need the forge working.
Where it sits in the tree
Stonework belongs to the Defense branch — the walls line — what an attacker has to get through before they reach your granary. It stays locked until Fortification reaches level 5. Studying it opens 2 further techs.
| Tech | Branch | Requires this tech at level |
|---|---|---|
| Moat Works | Defense | 8 |
| Battlements | Defense | 5 |
The road here: Weaponry to level 3 → Armor to level 8 → Fortification to level 5 → Stonework. That is 3 studies standing between a fresh Academy and this one.
| Prerequisite | Level required | Each resource | Study time |
|---|---|---|---|
| Weaponry | 3 | 47,880 | 40m 47s |
| Armor | 8 | 286,292 | 4h 3m |
| Fortification | 5 | 108,517 | 1h 32m |
| Total before you may begin | — | 442,689 | 6h 17m |
What it eventually opens: 8 studies sit downstream of Stonework, counting every remove.
| Study | Steps out | Buffs | At its cap | Study time at cap |
|---|---|---|---|---|
| Battlements | 1 | defense | +12% | 23m 43s |
| Moat Works | 1 | defense | +12% | 23m 43s |
| Deep Cisterns | 2 | defense | +7.2% | 13m 3s |
| Portcullis | 2 | defense | +12% | 23m 43s |
| Curtain Walls | 3 | defense | +9.6% | 14m 2s |
| Gatehouses | 4 | defense | +9.6% | 16m 2s |
| Concentric Castles | 5 | defense | +7.2% | 13m 3s |
| The Long Memory | 6 | production_rate | +6% | 10m 57s |
Related
Guide: Research & the Academy · Research Priorities. Studied at the Maester's Academy. Index: all 81 studies · the whole database.
Rest of the Defense branch: Fortification · Siege Craft · Palisades · Watchtowers · Moat Works · Battlements · Portcullis · Curtain Walls · Barbicans · Gatehouses · Counter-Siege · Murder Holes · Arrow Slits · Siege Engineering · Concentric Castles · Deep Cisterns · Bombardment Doctrine
Every figure above is generated from the shipped game code — the same constants and formulas the running game uses — and regenerated whenever the balance changes. Nothing on this page is hand-typed.