Liechtenstein. In August, Prince Hans Adam handed over the daily government responsibility to his son Alois. The prince retained the post of head of state. Hans Adam withdrew a little over a year after he passed a constitutional amendment that gave him greatly expanded powers and made Liechtenstein the only monarchy in Europe where the regent really has power. To celebrate the change of power, all residents were invited to a garden party. According to CountryAAH, the total population in Liechtenstein is 38,139 people in 2020. The Liechtenstein family has ruled the Principality for nearly 300 years.