On Thursday, the United Nations envoy to Syria, Lakhdar Brahimi, and Russian diplomats agreed to revive a peace initiative that stalled last summer after the Russians insisted it refrain from specifically excluding a role for Mr. Assad in any transition government. It was unclear whether Russia would accede to such a demand in any new agreement, and if so, whether the Syrian leader would land here.

Not all political exiles live in the districts of spacious country homes that lie here, along the Ryublyovsky Highway, but many do.

By many accounts, once here, these people enjoy the quiet and privileged afterlife of former elites of Soviet or Russian client states that have folded. In a snowy shopping center, the Barvikha Luxury Village, Gucci, Ralph Lauren and Dolce & Gabbana shops were open on a recent visit, of possible interest to Mr. Assad’s wife, Asma al-Assad, who is known to dress fashionably.

Borislav Milosevic, the brother of Slobodan Milosevic, the former Serbian leader who was accused of war crimes and who died in 2006, said that family members who had settled in Barvikha had been getting on swimmingly since the Yugoslav conflicts faded from the news.

The former leader’s widow, Mirjana Markovic, and son, Marko Milosevic, live in separate villas here.

“People come from Serbia to visit,” Borislav Milosevic said in a telephone interview about Ms. Markovic’s nine years in exile, a life he described as wholly “ordinary” in its daily routines. “She has friends over all the time. She lives a respectable, normal life.”