It refers to a toppled bronze memorial to the 17th century merchant Edward Colston, who was involved in the transatlantic slave trade.
这个底座意寓已被推倒的为 17 世纪参与了跨大西洋奴隶贸易的商人爱德华·科尔斯顿 (Edward Colston) 而建的青铜纪念碑。