The funeral of Pope Francis gave Catholics across the globe the chance to bid farewell to a beloved pontiff – and for world leaders to rub shoulders at a fraught time for international diplomacy.

Amid the sea of black at Pope Francis’ funeral, Donald Trump was the odd one out. The US president wore a dark blue suit paired with a light blue tie and his familiar American flag lapel pin, igniting accusations of breaking the strict Vatican dress code for papal funerals.