Complex sentence: The unframed "Samian Sibyl" on the floor was acquired for the Medici collection in 1777-it was a workshop copy of the pendant to Guercino's "Libyan Sibyl", recently bought by George III, and may be intended as a compliment to him.
Split into simpler sentences: The unframed "Samian Sibyl" on the floor was acquired for the Medici collection in 1777. It was a workshop copy of the pendant to Guercino's "Libyan Sibyl", recently bought by George III, and may be intended as a compliment to him.