Llwyn Mansion was built on the south side of Llanfyllin but was demolished in 1975.
http://history.powys.org.uk/school1/llanfyllin/llwyn.shtml gives more information.

Llwyn Mansion was built on the south side of Llanfyllin but was demolished in 1975.
http://history.powys.org.uk/school1/llanfyllin/llwyn.shtml gives more information.