LUXEMBOURG (AP) — Grand Duke Henri of Luxembourg will abdicate the throne after 25 years Friday in favor of his eldest son, Guillaume, who will become head of state of the tiny duchy at the heart of Europe. FILE - This photo combination shows Grand Duke Henri of Luxembourg, left, Dec. 1, 2023, in Dubai, United Arab Emirates and Luxembourg's Crown Prince Guillaume in Tokyo, June 10, 2024. Later on Friday, the new grand duke will host an evening gala for guests including French President Emmanuel Macron and German President Frank-Walter Steinmeier. Guillaume will be Luxembourg’s seventh grand duke since 1890, when the modern monarchy was established. For the rest, the grand duke will remain a political symbol,” he said.