Tony Hart

And so, another icon of my childhood has passed away.

Tony Hart died over the weekend, at the age of 83. A pioneer of children's broadcasting, how you remember him will depend on your age and the television programmes you watched: for me, this will always be Vision On, where his quick-draw skills and often huge, bright and imaginative paintings inspired a whole generation to enjoy making art.

After Vision On, he starred in his own show, Take Hart. With his delightfully animated side-kick, Morph, this was aimed more directly at encouraging young people in creating art of their own. Less well known was the fact that he designed the original Blue Peter badge - another icon. His was a warm, gentle and yet highly creative form of television which, alongside that of Oliver Postgate (creator of the Clangers and Bagpuss), helped to define 1970s childrens' television.

Although Hart won two Baftas and a lifetime achievement award, as with Postgate, his work provides the most fitting memorial and tribute to his abilities.

An Icon of Architecture

Saturday was a sad day for world architecture with the death of the Danish architect, Jørn Utzon, designer of the Sydney Opera House. The great sails were dimmed on Sunday as a tribute and mark of respect.

The Opera House remains one of the most iconic examples of architecture, and is perhaps the most internationally recognisable building of the 20th Century. At a time when modern architecture has acquired a very mixed reputation in the eyes of the public, from the problems of post-war system building to the 'carbuncle' accusations of the Prince of Wales, here is a building which has not just been admired, but taken to heart by many.

And yet its construction (which lasted nearly 15 years) was equally legendary for its technical problems, cost overruns and off-site rows, which ultimately led to Utzon's resignation. It's still not entirely clear who was to blame, although - with hindsight - it's probably fair to say that no-one realised at the time quite what a ground-breaking and complex design it was. But there can be no doubt that it graces its waterside location perfectly and, alongside the adjacent Harbour bridge, has become the very image of modern Sydney - as well as a UNESCO World Heritage Site.

Utzon never visited the finished structure, but was said not have held a grudge over the episode: perhaps the greatest tribute to his talent is that all three of his children have since become architects.