Ranavalona I, also known as Ramavo or Ranavalo-Manjaka I or Ranavalona reniny, was the sovereign of the Kingdom of Madagascar from 1828 to 1861. After positioning herself as queen following the death of her young husband Radama I, she pursued a policy of isolationism and self-sufficiency. She sought reduced economic and political ties with European powers and took vigorous measures to eradicate the small but growing Malagasy Christian movement initiated under Radama I by members of the London Missionary Society.