From the English Wikipedia page [1]
Laucesa Parish (Latvian: Laucesas pagasts) is an administrative unit of Daugavpils Municipality, Latvia. It belongs to the part of the municipality situated within the historic region of Selonia. The administrative centre is the village of Mirnijs. Prior to the 2009 administrative reforms it was part of Daugavpils District.
More information on the Latvian Wikipedia page [2]