Katarínka (German: St. Katharein, Hungarian: Szent Katalin kolostor) are the ruins of a Franciscan monastery and church dating back to the early 17th century, located deep in the forests of the Little Carpathians (Malé Karpaty) in western Slovakia, 20 km north of Trnava over Dubovský creek, close to the villages of Dechtice, Naháč and Dobrá Voda.
Ruins of Catherine's church and monastery are situated in the central part of the Little Carpathians in the Nature reserve of Katarínka about 3 kilometers west from the village Dechtice.
Ruins are accessible by the trail from the village Naháč marked by blue signs about 2 km north.
From the border of the Protected Landscape Area of the Little Carpathians (CHKO Malé Karpaty) the access is possible only by walking or cycling.
It is intended for young volunteers and has a form of two-week summer camps held in medieval spirit.