They date from 1943 to 1977, three years before Still died at the age of 75.
Parts of the present building may date from the 12th century.
The town has an old church dating from the 1850s.
The building probably dates from the 16th or 17th century.
An earlier house had been on the site dating from 1571.
The group of about 60 works, dating from 1960 until 1987, is expected to bring $1 million.
The present church is the third on the site, dating from 1867.
The show will include more than 300 works dating from the 1950's to the present.
It dates from the second half of the 13th century.
They are older than the church, dating from the early 18th century.