Stichting Alde Fryske Tsjerken (English: Old Frisian Churches Foundation) is a foundation which aims to preserve church buildings in Friesland, the Netherlands.
The foundation owns 38 churches as for 2010.[1] It was established in 1970 and is based in Leeuwarden, the capital of the province. All churches in the care of the foundation are Rijksmonuments, which is a condition for the foundation for newly acquired churches.[2] The churches are maintained with subsidy from the Rijksdienst voor het Cultureel Erfgoed, the province Friesland, municipalities, several culturefunds and public gifts.[3]