The contribution deals with the hitherto overlooked architectural historical importance of the medieval Ojstrica Castle and homonymous early modern mansion. The castle was built on a steep slope, on the south-western edge of the Lower Savinja Valley, above the road or, rather, path that runs from Trojane and, passing through Zaplanina in Presedlje, descends towards Tabor in the Savinja Valley. In the fourteenth and fifteenth centuries, the original layout with a massive tower was expanded by adding enclosed fortified plateaus on the most gently sloping part of the hill. After 1566, the medieval castle was abandoned and the construction of the Ojstrica Mansion commenced in the complex of the medieval Meierhof on the creek at the base of the castle hill. Until 1587, the central structure of the mansion was constructed on the old foundations and then, most probably by 1599, expanded and given a representative appearance. It was most likely in the first half of the seventeenth century that the masion was added a huge enclosed Renaissance garden. The architectural development came to completion in the late eighteenth century, with the construction of the late-Baroque Meierhof by the mansion. During the first half of the nineteenth century, the disused and dilapidating Ojstrica mansion and most of its accessory buildings were abandoned and completely demolished. The Meierhof itself was demolished in 1964.