divided critical opinion. Some early philosophical critics, such as Sartre and Theodor Adorno, praised him, one for his revelation of absurdity, the other for his works' critical refusal of simplicities; others such as Georg Lukács condemned him for 'decadent' lack of realism. Since Beckett's death, all rights for performance of his plays are handled by the Beckett estate, currently managed by Edward Beckett (the author's nephew). The estate has a controversial reputation for maintaining firm control over how Beckett's plays are performed and does not grant licences to productions that do not adhere to the writer's stage directions. Historians interested in tracing Beckett's blood line were, in 2004, granted access to confirmed trace samples of his DNA to conduct molecular genealogical studies to facilitate precise lineage determination. Some of the best-known pictures of Beckett were taken by photographer John Minihan, who photographed him between 1980 and 1985 and developed such a good relationship with the writer that he became, in effect, his official photographer. Some consider one of these to be among the top three photographs of the 20th century. It was the theatre photographer John Haynes, however, who took possibly the most widely reproduced image of Beckett: it is used on the cover of the Knowlson biography, for instance. This portrait was taken during rehearsals of the San Quentin Drama Workshop at the Royal Court Theatre in London, where Haynes photographed many productions of Beckett's work. An Post, the Irish postal service, issued a commemorative stamp of Beckett in 1994. The Central Bank of Ireland launched two Samuel Beckett Centenary commemorative coins on 26 April 2006: €10 Silver Coin and €20 Gold Coin. On 10 December 2009, the new bridge across the River Liffey in Dublin was opened and named the Samuel Beckett Bridge in his honour. Reminiscent of a harp on its side, it was designed by the celebrated Spanish architect Santiago Calatrava, who had also designed the James Joyce Bridge situated further upstream and opened on Bloomsday (16 June) 2003. Attendees at the official opening ceremony included Beckett's niece Caroline Murphy, his nephew Edward Beckett, poet Seamus Heaney and Barry McGovern. A ship of the Irish Naval Service, the LÉ Samuel Beckett (P61), is named for Beckett. An Ulster History Circle blue plaque in his memory is located at Portora Royal School, Enniskillen, County Fermanagh. In La Ferté-sous-Jouarre, the town where Beckett had a cottage, the public