Available for 16 civilizations
Intimidating siege gun excellent against buildings or any stubborn targets.
Weapons
Heals nearby out of combat units by 6 every 1 seconds.
Within 7.5 tiles of Abbey of Kings
When enemies are nearby, this building sounds an alarm, causing nearby units to get a +30% increase to attack speed.
Within 12.5 tiles of Berkshire Palace, Town Center, Keep, King's Palace, Outpost, Stone Wall Tower, The White Tower, Town Center
When enemies are nearby, this building sounds an alarm, causing nearby units to get a +20% increase to attack speed.
Within 12.5 tiles of Berkshire Palace, Town Center, Keep, King's Palace, Outpost, Stone Wall Tower, The White Tower, Town Center
All units near an Outpost gain +0.5 move speed
Within 12.5 tiles of Fortified Outpost
Repairs nearby siege engines for 2 health every second.
Within 4.5 tiles of Machine Workshop
Siege units near the Castle gain +10% damage and +1 tiles range.
Within 15 tiles of Castle, Castle of the Crow
Nearby units gain a permanent healing buff. The healing buff will heal the unit when out of combat by 4 health every 6 seconds.
Within 8.5 tiles of Ryokan
Astronomical Clocktower
Reload Drills: Increase the attack speed of Bombards by +33%.
Blacksmith
Military Academy: Increase the production speed of infantry, cavalry, siege, and transport units at buildings by 33%. Does not affect religious units or other support units.
Siege Works (Improved): New carpentry techniques increase the health of siege engines by +30%. If Siege Works has already been researched, increase their health by +10% instead.
High Armory
Fine Tuned Guns: Increase damage of Bombards by +20%. Bombards gain +50 damage vs Infantry.
Siege Crew Training: Setup and teardown speed of Mangonels, Trebuchets, and Bombards is instant.
Machine Workshop
Lightweight Frames: Increase the movement speed of siege engines by +10%.
Reinforced Axles: Further increase the movement speed of siege engines by another +10%.
Madrasa
Chemistry: Advancements in alchemical research increase the bonus damage of all gunpowder siege weapons by +25%.
Siege Works: New carpentry techniques increase the health of siege units by +20%.
Siege Workshop
Varangian Arsenal
Siege Technology
Zhu Xi's Library
Cloud of Terror: Adds area of effect damage to Bombards.
Greased Axles: Increase the movement speed of siege engines by +15%.
Siege Carpentry: Upon completion, siege units gain access to the Structural Reinforcements ability. Siege units gain +20 melee armor and +5 fire armor for 10 seconds.
Prolonged Siege: Siege units will deal 10% additional damage for every 10 seconds they are set up - to a maximum of 50%.
Greased Axles (Improved): Increase the movement speed of siege engines by +25%. If Greased Axles has already been researched, increase it by +10% instead.
Increase the health of all siege units by 5%.