Andriamanelo in the context of "Merina Kingdom"

A rova is a fortified royal complex built in the central highlands of Madagascar by the Merina of the Andriana (noble) class. The first rova was established at Alasora by king Andriamanelo around 1540 to protect his residence throughout a war with the neighboring Vazimba. Rovas are organized according to traditional symbolic notions of space and enclose the royal residences, the tomb of the founder, and a town square marked with a stone. They are protected with walls, trenches and stone gateways and are planted with fig trees symbolic of royalty.

The Kingdom of Merina, also known as the Kingdom of Madagascar and officially the Kingdom of Imerina (Malagasy: Fanjakan'Imerina; c. 1540–1897), was a pre-colonial state off the coast of Southeast Africa that, by the 18th century, dominated most of what is now Madagascar. It spread outward from Imerina, the Central Highlands region primarily inhabited by the Merina ethnic group with a spiritual capital at Ambohimanga and a political capital 24 km (15 mi) west at Antananarivo, currently the seat of government for the modern state of Madagascar. The Merina kings and queens who ruled over greater Madagascar in the 19th century were the descendants of a long line of hereditary Merina royalty originating with Andriamanelo, who is traditionally credited with founding Imerina in 1540.

In 1883, France invaded the Merina Kingdom to establish a protectorate. France invaded again in 1894 and conquered the kingdom, making it a French colony, in what became known as the Franco-Hova Wars.

The Hova, or free commoners, were one of the three principal historical castes in the Merina Kingdom of Madagascar, alongside the Andriana (nobles) and Andevo (slaves). The term hova originally applied to all members of a Malagasy clan (possibly of the Zafiraminia people) that migrated into the central highlands from the southeast coast of the island around the 15th century and absorbed the existing population of Vazimba. Andriamanelo (1540–1575) consolidated the power of the Hova when he united many of the Hova chiefdoms around Antananarivo under his rule. The term Hova remained in use through the 20th century, though some foreigners transliterated that word to be Ankova, and increasingly used since the 19th century.

In and after the 16th century, slaves were brought into Madagascar's various kingdoms, and social strata emerged in Merina kingdom. The Hova emerged as the free commoners caste below the nobles hierarchy. The subset of Hova related to the king by blood came under the title Andriana. The social structure of the new kingdom became further defined under his son Ralambo (1575–1612), who further subdivided the Andriana into four ranks. Ralambo was also the first to use the term Imerina (land of the Merina) to describe the land occupied by the Hova people, who thereafter gradually adopted the identity and label of Merina.

Ralambo was the ruler of the Kingdom of Imerina in the central Highlands region of Madagascar from 1575 to 1612. Ruling from Ambohidrabiby, Ralambo expanded the realm of his father, Andriamanelo, and was the first to assign the name of Imerina to the region. Oral history has preserved numerous legends about this king, including several dramatic military victories, contributing to his heroic and near-mythical status among the kings of ancient Imerina. The circumstances surrounding his birth, which occurred on the highly auspicious date of the first of the year, are said to be supernatural in nature and further add to the mystique of this sovereign.

Oral history attributes numerous significant and lasting political and cultural innovations to King Ralambo. He is credited with popularizing the consumption of beef in the Kingdom of Imerina and celebrating this discovery with the establishment of the fandroana New Year's festival which traditionally took place on the day of Ralambo's birth. According to legend, circumcision and polygamy were also introduced under his rule, as was the division of the noble class (andriana) into four sub-castes. Oral history furthermore traces the tradition of royal idols (sampy) in Imerina to the reign of Ralambo, who made heavy use of these supernatural objects to expand his realm and consolidate the divine nature of his sovereignty. Due to the enduring cultural legacy left by this king, Ralambo is often considered a key figure in the development of Merina cultural identity.