- 1 Landauer & Machall (Firm)
- 15 Landings (marine structures)
- 2 Landis' Retreat
- 1 Landis, Kenesaw Mountain, 1866–1944
- 1 Landless, Henry & Son (Cotton weaving)
- 3 Landmark buildings
- 1 Landon, Letitia Elizabeth (L.E.)
- 2 Landor, Walter Savage, 1775-1864
- 1 Landreth, David
- 1 Landscape - suburbs of Munich (Work of Art)
- 2 Landscape architecture
- 27 Landscape paintings
- 31 Landscape photographs
- 93 Landscape prints
- 747 Landscapes (environments)
- 274 Landscapes (representations)
- 10 Landscaping
- 1 Landsdale and McGrath Real Estate (firm)
- 1 Landseer, Charles, 1799 or 1800-1879
- 3 Landseer, Sir Edwin Henry, 1802-1873
- 1 Lane, D.M. Carriage Factory
- 2 Lane, Edward William, 1801-1876
- 1 Lane, Richard James
- 1 Lane, Samuel Haycroft, 1804-1871
- 1 Lanfranco, Giovanni, 1582-1647
- 1 Langford, John Alfred, 1823-1903
- 1 Langham, The
- 6 Langhorne, Pennsylvania
- 1 Langres, France
- 1 Lang's Candy & Chocolate Factory
- 2 Lansdale, Pennsylvania
- 7 Lansdowne Avenue
- 2 Lansdowne Drive
- 1 Lansdowne Land Company
- 2 Lansdowne, Henry Petty-Fitzmaurice, Marquess of, 1780-1863
- 5 Lansdowne, Pennsylvania
- 1 Lanson Company
- 9 Lanterns
- 1 Laos
- 1 Lapland
