Historic drawings by Leonardo da Vinci have gone on show in Northern Ireland for the first time.
The Ulster Museum in Belfast said its temporary exhibition included some of the celebrated artist's finest work.
Tim Cooke, director of National Museums Northern Ireland, said: "Five hundred years on, Leonardo's work continues to command both awe and admiration."
The exhibition, which runs until August 27, is being staged in collaboration with the Royal Collection Trust.
The Ulster Museum will open on Mondays during July and August to facilitate demand over the holiday period.
The organisers said the event entitled Ten Drawings by Leonardo da Vinci: A Diamond Jubilee Exhibition from the Royal Collection shows the extraordinary scope of Leonardo's interests - painting and sculpture, botany, anatomy, engineering, mapmaking and hydraulics and his use of different media - pen and ink, red and black chalks and metalpoint.
Mr Cooke said: "It will be the first time these works by one of the world's most celebrated artists have gone on display in Northern Ireland.
"We are sure this exhibition will impress both local and international visitors to the Ulster Museum and will greatly enrich our art exhibitions during this special year for tourism."
He said he was grateful to the Royal Collection Trust for its support on the project.
The museum said that through drawing Da Vinci attempted to record and understand the world around him and he maintained that an image conveyed knowledge more accurately and concisely than words, although some of his drawings are extensively annotated.