However, Albert II is no longer king of Belgium but did he hold the title throughout his reign or was this title reverted back after his abdication? Interesting that in the Netherlands, the monarch upon abdication, or at least the former queens, reverts to their previous style/titles, e.g., princess of Orange-Nassau. Meanwhile, the former king of Belgium retains his title as 'king' and so does the former grand duke of Luxembourg retains his title.