The circle was erected in the grounds of Y Plas, Macynlleth, in 1936 for the 1937 National Eisteddfod.
There are two gorsedd circles at Machynlleth, one to the east of the town, overlooking the golf course with large stones, and a second, with small stones, in the grounds of Y Plas. Both circles have 12 stones in a circle and two outliers on the east side which suggests that they both predate 1951. These might have been used for one of the Powys Provincial Eisteddfodau held in Machynlleth in 1879, 1905, 1958, 1969, 1989, 2004, 2012.
The photographs of a Gorsedd ceremony in 1981 show that the site overlooking the Golf Course was used at that time.
The Floral Dance is one of the most popular rites in the Gorsedd Circle and on the Eisteddfod stage. About 24 junior-school-aged girls take part; they wear green dresses adorned with meadow flowers and coronets of flowers in their hair and they carry sprays of flowers. The dance portrays the gathering of meadow flowers and it is linked to the Presentation of the Blodeuged (the gift of flowers) as two of the floral dancers add their bouquets to the Blodeuged itself. However it is a comparatively recent rite. It was performed for the first time at the Machynlleth Proclamation ceremony in 1936 and it was devised by Cynan, the Gorsedd Recorder, and junior school teachers from the area. The dancers did not perform on the Eisteddfod stage until the Ystradgynlais Eisteddfod in 1954.
Reference: information from research into Gorsedd Circles carried out by Michael Freeman between 2005-2024.