The brutalist arts-and-towers complex, where even great explorers get lost, is showing its age. Let’s hope the 50th anniversary upgrade is better than the ‘pointillist stippling’ tried in the 1990s

The Barbican is aptly named. From the Old French barbacane, it historically means a fortified gateway forming the outer line of defence to a city or castle. London’s Barbican marks the site of a medieval structure that would have defended an important access point. Its architecture was designed to repel. Some might argue, as they stumble out of Barbican tube station and gaze upwards, not much has changed in the interim.

The use of the word “barbican” was in decline in this country until the opening in 1982 of the Barbican Arts Centre. Taking 20 years to build, it completed the modernist megastructure of the Barbican Estate, grafted on to a huge tract of land devastated by wartime bombing. The aim was to bring life back to the City through swish new housing, energised by the presence of culture. Nonetheless, the arts centre, the elusive minotaur at the heart of the concrete labyrinth, was always farcically difficult to locate. To this day, visitors are obliged to trundle along the Ariadne’s thread of the famous yellow line, inscribed in what seemed like an act of institutional desperation, across concrete hill and dale.