The Palace at Osowa Sien is a privately owned and operated boutique castle hotel with individually designed and well-appointed suites (each a comfortable 30-55 square meters).

An intimate address surrounded by nature and known for its positive energy - guests quickly feel at home here. Whether it's the whimsical timber-and-stone tower dominating the landscape, or the beauty of the surrounding 300-year old treed estate, the chateau provides an ideal backdrop for business and private events, family holidays, and wellness retreats.

Take a look below for our latest highlights, or simply click upon the button above to book your stay now.


yoga retreat in the polish countryside

Yoga Retreats are Back!

renew mind, body, and soul in the heart of the Polish countryside

Bring your parents, siblings, or besties with you and escape to our countryside castle for a intimate meditation and wellness retreat. Suitable for practitioners of all levels, our next session includes Vinyasa yoga classes (lead by Roksana of ROXI YOGA), comfortable overnight accommodations, and a slow-living-inspired foodie-experience.

Next Retreat: 11-13 October, click here for details. Can’t make it? Try our 29 November - 1 December getaway!

a carriage rides through Osowa Sien, Poland

Scenic Fall Forest Rides

While staying in The Palace at Osowa Sien, groups of 2-10 may take a carriage tour through the local forest. The steady steeds Atlas and Laggatos will greet you at the castle and, after boarding their carriage, take you for an exclusive 2-hour trot. Fitted with bench and table, chilled-to-perfection craft beers and wines from the castle cellars come recommended for the ride.

For groups of 10+, Atlas and Laggatos are accompanied by their friends and additional carriages. For more details, please email.

the custom finish sauna in the palace at osowa sien

We’ve Opened a Private Spa!

Since Winter 2018, we began to realise our dream of offering a private spa for the sole enjoyment of our hotel guests. Already available to guests, the grand opening will be during our Fall Romantic Getaway Weekend 15-17 November. The spa features a custom Finnish sauna, rain-fall walk-in shower, lounge, and massage room. While staying with us, guests may reserve one-hour sessions for their private enjoyment. No need to share…with anybody. For massage and treatment offers, please email

full-time outdoorozpenair dinner inferno of white castle

Celebrate with a Romantic Dinner-for-two at the Castle

Planning something special for an intimate milestone occasion? Perhaps it is a birthday, proposal, or wedding anniversary that you want to make all the more memorable.

We can help.

Our discreet and professional team is dedicated to creating magical moments in The Palace at Osowa Sien that will be cherished for a lifetime.

Email your wants and desires to

+48 794 341 846