What structure was designed by John A Roebling, who supervised construction until his death when the project was taken over by his son, Washington?
Brooklyn Bridge, New York
Which construction, designed by Finnish-American architect Eero Saarinen and structural engineer Hannskarl Bandel in 1947, that stands 630 feet (192 m) tall and is 630 feet (192 m) wide at its base, is called "the tallest monument in the USA"?
Which 600-seat opera house was built in Sussex by John Christie in 1934 as a tribute and memorial to his wife, Audrey Mildmay?
What famous and still surviving structure was built in Rome by the Emperors Vespasian and later Titus between about 70 and 80 CE?