A giant catapult will be unleashed at Warwick Castle from July.
The trebuchet is being made from 28 tonnes of wood
Work has begun on the 59ft (18m) tall medieval war machine, which will weigh 22 tonnes and fire daily.
The trebuchet, being built in Wiltshire from more than 300 pieces of oak, will take eight men 30 minutes to prepare and load for firing.
The design has been developed by medieval weapons expert Dr Peter Vemming, and will be one of the largest firing siege machines in the world.
He said: "These machines are incredible pieces of engineering and it is really something to see them in motion."