This Window was presented by the Ballarat City Council in 1916 although the Observatory was then under the control of of the Town of Ballarat East. The Ballarat City Council first became directly involved when the Town of Ballarat East and the City of Ballarat amalgamated in 1921. The base panel contains the City Arms, with the motto "Honi soit qui mal y pense", often translated as "Evil to him who evil thinks" but perhaps more accurately transcribed as "Shame to him...."