The dissident died in a Siberian penal colony in the Arctic Circle on February 16, 2024 while serving a 19-year sentence on politically motivated charges.
The circumstances of his death have not been clarified.
The opposition leader's widow, Yulia Navalnaya, launched a competition to design the memorial in December.
Hundreds of ideas were submitted, mostly from Russia but also internationally.
Earlier this month, Navalnaya called for a vote on three shortlisted designs and for donations for the construction of the stone monument to be erected on her husband's grave in Moscow.
Navalnaya said in a video message that the monument would not only be a place of rest or remembrance.
"It will be a place of hope and strength for all those who believe in its principles and dream of a beautiful Russia in the future."
Navalny's widow also invited people to a memorial evening at the Kaiser Wilhelm Memorial Church in Berlin. where she is continuing her husband's opposition work in exile.
Navalny's team also plans to mark the anniversary with a live broadcast online, during which friends and associates will remember his work.
Events including rallies, screenings of the documentary Navalny and vigils were also planned.
As supporters commemorated the opposition leader at his grave in Moscow's Borisovsky Cemetery, human rights activists warned of the risk of arrest due to his anti-corruption foundation being classified as "extremist" and being banned in Russia.
The prominent activist and Putin critic survived a poisoning attack with the nerve agent Novichok in 2020 but was arrested on his return to Russia in January 2021 and subjected to a series of show trials.
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