Finally, there is the outer ward which encompasses the castle and was built under Edward I. Although there were several phases of expansion after William the Conqueror founded the Tower of London, the general layout has remained the same since Edward I completed his rebuild in 1285.
Sedangkan bangsal yang paling luar merupakan bangunan puri yang dibangun oleh Edward I. Meskipun ada beberapa perluasan yang dilakukan setelah William sang Penakluk mendirikan menara ini, tata letak umum yang digunakan masih tetap sama sejak Edward I selesai membangun kembali menara pada tahun 1285.