The Armourer's House is a children's historical novel by Rosemary Sutcliff and first published in 1951. It is set primarily in London during the reign of King Henry VIII. It is Sutcliff's third book, and is acknowledged by her as being 'a little too cozy and a little too sweet,' being part of what she refers to as her 'apprenticeship phase of writing.'and will likely read as more of an outright children's novel than most of her later works. Though unrelated to the Eagle of the Ninth series connected by the Dolphin Signet ring, this novel features Sutcliff's first use of Dolphin imagery in her storytelling.