 It was not until the dawn of the 19th century that a perimeter wall of sharpened wooden stakes would constitute another defining feature of rova construction.The Rova of Antananarivo is located above sea level on Analamanga, originally the highest of the numerous hills in Antananarivo.Around 1610 or 1625, Andrianjaka, King of Imerina and grandson of King Andriamanelo, ordered a garrison of 1,000 soldiers to seize the strategic site from its original Vazimba inhabitants.