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.

With its soaring ceilings, meandering pathways and mesh-like walls, Taichung Art Museum, designed by Sanaa, sweeps visitors from library to gallery to rooftop garden for rousing views

Walking through the brand new Taichung Art Museum in central Taiwan, directions are kind of an abstract concept. Designed by powerhouse Japanese architecture firm Sanaa, the complex is a collection of eight askew buildings, melding an art museum and municipal library, encased in silver mesh-like walls, with soaring ceilings and meandering pathways.

Past the lobby – a breezy open space that is neither inside nor out – the visitor wanders around paths and ramps, finding themselves in the library one minute and a world-class art exhibition the next. A door might suddenly step through to a skybridge over a rooftop garden, with sweeping views across Taichung’s Central Park, or into a cosy teenage reading room. Staircases float on the outside of buildings, floor levels are disparate, complementing a particular space’s purpose and vibe rather than having an overall consistency.

National Trust looks to halt construction, claiming Trump tore down historic East Wing without needed permission

Donald Trump is facing a federal lawsuit seeking to halt construction on his $300m White House ballroom, with historic preservationists accusing the president of violating multiple federal laws by tearing down part of the iconic building without required reviews or congressional approval.

The legal challenge, filed on Friday by the National Trust for Historic Preservation in the US district court for the District of Columbia, represents the most significant attempt yet to stop Trump’s 90,000-sq-ft addition to the White House complex. The organization is seeking a temporary restraining order to freeze all construction activities until proper federal oversight procedures are completed.