LONDON — Work to give 21st-century London yet another skyscraper has uncovered traces — in fact chunks — of the city's origins almost 2,000 years ago.

工程團隊計畫讓21世紀的倫敦再添一棟摩天大樓，卻於工地意外發現兩前千年前的城市遺跡，並挖掘出許多大塊的古老建築牆體。