This is a French medal apparently commemorating a UFO sighting of a wheel like object in 1680. Artist/location unknown.
This picture shows a UFO sighting over Hamburg, Germany 4 November 1697. The objects were described as "two glowing wheels"
This image is by flemish artist Aert De Gelder and is entitled "The Baptism of Christ" It was painted in 1710 and hangs in the Fitzwilliam Musuem, Cambridge. A disk shaped object is shining beams of light down on John the Baptist and Jesus.
The above illustration depicts a sighting that occurred at 9.45pm on the evening of 18th August 1783 when four witnesses on the terrace of Windsor Castle observed a luminous object in the skies of the Home Counties of England. The sighting was recorded the following year in the Philosophical Transactions of the Royal Society. According to this report, witnesses observed an "oblong cloud moving more or less parallel to the horizon. Under this cloud could be seen a luminous object which soon became spherical, brilliantly lit, which came to a halt; This strange sphere seemed at first to be pale blue in colour but then its luminosity increased and soon it set off again towards the east. Then the object changed direction and moved parallel to the horizon before disappearing to the south-east ; the light it gave out was prodigious; it lit us everything on the ground." The image was captured in this by Thomas Sandby (a founder of the Royal Academy) and his brother Paul, both of whom witnessed the event.