MOSCOW — At least 16 protesters were detained in front of the Russian Parliament building on Wednesday as legislators approved a plan that could uproot up to 1.6 million Muscovites from their aging Soviet-era residences and move them into newly built apartments.

The resettlement plan, which has been hotly contested, has been one of the issues feeding protests this spring in the capital. Opponents of the plan also participated in demonstrations against corruption and political stagnation on Monday.

Yulia Galyamina, the leader of the resettlement protests, was one of more than 850 people detained by the Moscow police on Monday at a large anti-Kremlin rally on the city’s main Tverskaya thoroughfare. Ms. Galyamina said she had been beaten by the police officers who detained her and that she had been hospitalized for a concussion.

Nationwide, 1,721 people were detained on Monday, according to OVD-Info, an independent organization that tracks arrests, during one of the most sweeping anti-government demonstrations since President Vladimir V. Putin came to power.