- Parish church in the Tower for the inhabitants there, in Tower ward (S. 492).
- First mention: Founded probably Temp. H. I. Mentioned in reign of K. John, 1210 (Bell, p. 1 ; Clark, ii. 257). Present church erected 1305-6 (Rot. claus., 34 Ed. I. m. 8, quoted Bell, 1). Rector and chaplains appointed 1353 (Newcourt, I. 529). Small cell or hermitage behind the chapel sometimes called " Recluso Sancti Eustachif Turris London" (Claus., 37 H. III. m. 21, quoted Bayley, Ed. 1830, p.125).Early English columns in nave, Decorated window in north aisle, fine high Perpendicular window at east end. Piscina and squint (Bell, 5).Burnt 1512 and restored 1532 (Bell, 4 and 5). Restored 1862, 1876-7.A Rectory in the gift of the Crown.Subjected to jurisdiction of Bishop of London, temp. Ed. VI. (P.S). Afterwards became Benefice donative (p.6).Dedication: Uncommon one. Bell says it points to its use as a place of worship for the prisoners in contradistinction to the chapel of St. John, used by the Sovereign and the Court (p.3),
A Dictionary of London. Henry A Harben. 1918.