| “ | Building line of sight increased. | ” |
| —In-game description | ||
Gas Lighting is a technology in Age of Empires III that can be researched by European civilizations at the Church (Mosque for the Ottomans). Once researched, it increases the line of sight of all buildings by 4.
| Religious technologies | |
|---|---|
| Town Watch · Gas Lighting · Standing Army · Mass Cavalry | |
| Bastion · Mission Fervor · Mercantilism | |
 Mexicans | Holy Mass · Liturgy · Guadalupanos · Cry of Dolores · State Religion · Visit of the Seven Houses · Día de Muertos · Redoubts |
 Ottomans | Millet System · Koprulu Viziers · Grand Bazaar · Galata Tower District · Topkapi · Tanzimat |
 United States | Medical Science · Bill of Rights · Redoubts |