How much does Royal Mortars cost in AoE3?

400 food, 400 wood, 30 seconds (AoE3: Definitive Edition 100.19.18309).

What does Royal Mortars do in AoE3?

Mortar: damage +25%, hit points +35%, time between attacks (Cannon) −0.5. The game says: "Danish Mortar attack, hitpoints, and rate of fire greatly increased."

Technology

Royal Mortars

Royal Mortars (tech ID RGDanishMortars) is a technology in AoE3: Definitive Edition 100.19.18309 costing 400 food, 400 wood, 30 s to research at the Artillery Foundry. Effect: Mortar: damage +25%, hit points +35%, time between attacks (Cannon) −0.5.

Quick answers (3)

How much does Royal Mortars cost in AoE3?: 400 food, 400 wood, 30 seconds (AoE3: Definitive Edition 100.19.18309).
What does Royal Mortars do in AoE3?: Mortar: damage +25%, hit points +35%, time between attacks (Cannon) −0.5. The game says: "Danish Mortar attack, hitpoints, and rate of fire greatly increased."
What is the tech ID of Royal Mortars?: RGDanishMortars.

Danish Mortar attack, hitpoints, and rate of fire greatly increased.

What it does

Mortar: damage +25%, hit points +35%, time between attacks (Cannon) −0.5

Cost: 400400
Research time: 30 s
Game ID: RGDanishMortars

Researched at

Artillery Foundry

Civilizations

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).