Memorial to some of the military dead who have no known grave The Gate, in Ypres, Belgium, is dedicated to the British and Commonwealth soldiers who were killed in the Ypres Salient of World War I and whose graves are unknown.
What building, built between 1754 and 1790 as a church to St Genevieve, was set aside as a mausoleum for famous Frenchmen in 1792?
Which German-American structural engineer and designer was Chief Engineer for the construction of the Golden Gate Bridge, San Francisco?
What famous and still surviving structure was built in Rome by the Emperors Vespasian and later Titus between about 70 and 80 CE?