Lime kiln use in Saskatchewan from the earliest days of European settlement was researched and documented. Remaining features were relocated and oral or documentary history was gathered. This information was put in context on the prairies in regard to early cooperative industries and employment, architectural traditions, commodities in demand, the generation of supporting industries and spatial patterning. These resulting data were then used to explore several research questions. Lime kilns were associated with early trail systems upon which the earliest European settlements were established due to projected railway routes and areas suitable for wheat agriculture. Most of the earliest architectural traditions in Saskatchewan required the use of lime because homesteaders - predominantly those from northern Europe and specifically the British Isles - were building with log, stone and gravel or rammed earth and needed and to have access to a lime kiln in the area. The skill and knowledge to build and burn successful kilns was transmitted either through those bringing the technological know-how with them from their country of origin or was adopted by new settlers arriving from the east or the south. These skills were also taught by Indian Agents to native people on reserves as a way to generate income. The construction and use of lime kilns is indicative of one of the earliest settlement industries in Saskatchewan and was usually a necessity for the establishment of built heritage.