Gregory XVI, Diversion of the river Aniene at Tivoli, 1835, by Carl Heinrich Lorenz, view of the new tunnels through M. Catillo, signed H LORENZ F low right, rev. view of the new waterfalls, 76mm. (Cam.-Vert.412; Ma.623; Pat.39), extremely fine
Gregory XVI, Diversion of the river Aniene at Tivoli, 1835, by Carl Heinrich Lorenz, view of the new tunnels through M. Catillo, signed H LORENZ F low right, rev. view of the new waterfalls, 76mm. (Cam.-Vert.412; Ma.623; Pat.39), extremely fine

Details
Gregory XVI, Diversion of the river Aniene at Tivoli, 1835, by Carl Heinrich Lorenz, view of the new tunnels through M. Catillo, signed H LORENZ F low right, rev. view of the new waterfalls, 76mm. (Cam.-Vert.412; Ma.623; Pat.39), extremely fine

See also colour plate