The Alka Knights Society was founded in 1715, and today it acts as an association of citizens.
The main activity of the Society is to organize the Alka Tournament of Sinj. A great number of volunteers care about the work of the Society (Assembly, Governing Board, Supervisory Board, Court of Honour). The members of the Society are exclusively of local origin. The Alka Knights Society is the owner of two trading companies – Alka marketing d.o.o. and Alkarska ergela d.o.o.
In 1979 the Alka Knights Society collection of uniforms, equipment and weapons was declared a monument of the highest category. In 2007 the Alka of Sinj was entered in the Register of Croatian Cultural Monuments, and on 16th of November, 2010 it was included in the UNESCO Representative List of the Intangible Cultural Heritage of Humanity.