Sri Lanka was the first Asian country known to have a female ruler: Anula of Anuradhapura (r. 47–42 BCE). Sri Lankan monarchs undertook some remarkable construction projects such as Sigiriya, the so-called "Fortress in the Sky", built during the reign of Kashyapa I of Anuradhapura, who ruled between 477 and 495. The Sigiriya rock fortress is surrounded by an extensive network of ramparts and moats. Inside this protective enclosure were gardens, ponds, pavilions, palaces and other structures.