In the 1860s, Israel and Lydia Brightman built the Stone Barn off of East Horseneck Road to have a place to keep and milk their cows and store food and hay for their livestock. In the early 1900s, a dairy operation was run out of the barn. In the late 1920s, if was transformed into an equestrian center.

It’s likely that none of the barn’s early inhabitants ever imagined that decades later, it’d be used to practice downward facing dog, cow pose, and horse face pose, among others.

On every Friday, Saturday, and Sunday at 9 a.m., the barn, which is located on the Mass Audubon’s Allens Pond Wildlife Sanctuary, is home to Yoga at the Barn for adult yogis of all levels.

Juliet Loranger of Yoga on Union has organized and hosted the classes at the barn for the past three years after being approached by Jennifer Costa, volunteer and outreach programs administrator of Mass Audubon’s South Coast Sanctuaries.

“I was like, ‘Oh yeah, let’s do it,’” said Loranger.

Loranger said the setting of the barn allows some of her regulars from her New Bedford-based studio to escape the hustle and bustle of the city.

“Being able to feel tucked away in a true New England landscape, it’s a great little retreat,” she said. “At the studio in New Bedford, you have the city sounds, but out here, it’s birds, birds, birds and the sound of other random animals.”

She said the barn is the ideal location because it provides an almost outdoor atmosphere without having to worry about things like ticks, for instance.

“It’s an indoor space, but it’s about as outdoors as you can get,” said Loranger of the airy, sunshine-filled barn that was restored in 2011 with Community Preservation funding and since has been used for a variety of programs hosted by Mass Audubon. “It’s a great place to teach.”

Not only is the barn and sanctuary host to the weekly classes, but Loranger and company have also held the “Open Hearts, Open Skies” weekend yoga retreats for a weekend each summer, with this summer’s retreat to take place on July 11 and 12.

Jessica Kaeterle, a past participant at the retreat, called the weekend on the property “harmonious, empowering and peaceful.”

“The retreat encompassed a wonderful blend of yoga and meditation practices, guided nature walks through the beautiful property, amazing locally-grown and prepared food and just enough free time to explore the surrounding area,” said Kaeterle. “It couldn’t have been a more peaceful setting. The location and ambiance made it feel like a true retreat.”

Yoga at the Stone Barn classes are $15 apiece, and run through September 27. Friday classes are hosted by Loranger, Saturdays by Yoga on Union’s Michael Brisson, and Sundays alternate between Loranger and Angela Curry. A “Summer Solstice Gong Bath” will also be held on Sunday, June 21 from 5 to 6:30 p.m. for $30.

Costa said the partnership between Mass Audubon and Yoga on Union has provided an aesthetic not typically associated with your typical yoga classes.

“To put it simply, Mass Audubon and Yoga on Union connect people with nature and wellness,” she said.