Which hyperboloid lattice tower, built in Moscow between 1920 and 1922, is an early landmark of constructivist engineering?

• A The Shukhov Tower ✓
• B The Ostankino Tower
• C The Tatlin Tower
• D The Leningrad Tower

Designed by Vladimir Shukhov, this 160-metre radio tower pioneered the diagrid structure later used worldwide, from the Eiffel Tower's modernisation to contemporary skyscrapers.