The Fraeylemaborg (Dutch pronunciation: [ˈfraːiləmaːˌbɔr(ə)x]) is a borg in the village of Slochteren in the Netherlands.

These strong houses or keeps were built in the Middle Ages to store harvests and to protect their produce from robbers.

The Fraeylemaborg is located in the middle of the town of Slochteren which upon its discovery in 1959 gave its name to the largest gasfield in the world.

It was bought by Henric Piccardt (married to Anna Elizabeth Rengers, Evert's sister), who borrowed the necessary funds from Stadtholder William III.

Piccardt extensively rebuilt the borg and he also landscaped a huge formal garden in the style of Louis XIV's France.