If you see a light aircraft with a banner attached to it which reads "Insult the State" flying over the Iveagh Gardens this evening between 5 p.m. and 6 p.m., be not alarmed. What is it? It's installation art, which will be officially opened tonight at a reception hosted by Ray Burke, TD, who must have more time for cultivating his mind these days as he absents himself from Cabinet meetings in which a future Tribunal on payments to politicians is discussed.Much of the work is based in the Iveagh Gardens in Earlsfort Terrace, with other sites including Dublin Castle, the Debtors' Prison, the Civic Offices at Woodquay and Parnell Square North. The novelty of this exhibition is that 11 exhibitors from other European countries were chosen by their counterparts here, a nice short cut through the curatorial maze. The exhibition explores aspects of European identity and runs until mid-October.Some of the sights which will greet your eyes during this time include Finnish artist Kaarina Kaikkonen's 150 ghostly, outsized suits, which dress the cascade of the Iveagh Gardens, and evoke the anonymous administrative machinery of government, the British artist Max Eastley's Pine Ghost in the rosarium area of the gardens, which will fuse sound and sculpture, using latex strips which vibrate in the wind and create difference pitches of sound, and Kevin Gray's 288 Hours Of Solitary Leisure, a performance about imprisonment and torture, in the Debtors' Prison grounds.This is all happening as work begins on the Temple Bar Street Art Symposium, which will be installed by the middle of the month. The time is truly right for Temple Bar's debate on public art, which takes place on September 26th and 27th, and speakers at which include Irish Times contributor Luke Clancy, Sandra Pervical of the Public Art Development Trust in the UK, Declan McGonagle, Director of IMMA, and Eilis O'Connell, artist. The fee of £50 will be waived for artists. Phone 01-6710073 to reserve a place.