watch 02:06 The Loop (Games) Do you like this video? Age of Empires, Researching Watch Tower makes the Watch Tower available for building. The research is done from the Granary and costs 50 Food. This option is available only from the Tool Age. Retrieved from "https://ageofempires.fandom.com/wiki/Research_Watch_Tower?oldid=225722" Categories: Age of Empires Tool Age Building technologies Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.