Since it opened in 1983, Trump Tower has been home to celebrities and billionaires, and the occasional Russian Mobster or those connected to them. And those Russian Mobsters were connected in some way to Semion Mogilevich, who is considered the most dangerous Mobster in the world.

Coincidence? Here’s a look:

Felix Henry Sater: Born in the Soviet Union in 1966, Felix H. Sater immigrated with his family to the US at age of 7. Felix became a Wall Street stock broker. Convicted of assault in 1991 for stabbing another broker in the face with a broken piece of a margarita glass. Spent a year in prison. Pleaded guilty in 1998 for his role in a $40 million “pump and dump” penny stock fraud at a Mafia-linked brokerage firm. Avoided prison by becoming a government informer. Provided U.S. federal authorities with “information crucial to national security and the conviction of over 20 individuals, including those responsible for committing massive financial fraud and members of La Cosa Nostra,” former U.S. Attorney General Loretta Lynch wrote during her Senate confirmation hearing. Permanently barred from trading stocks, Sater went into real estate. Began working in Trump Tower around 2002 for Bayrock (exact date is unclear). Tried to develop deals for Trump in Russia, where he watched Trump’s children during a 2006 visit. Under oath, Trump said he didn’t believe Sater was in the Mob. Recently involved in a Ukrainian “peace plan” with the help Trump’s personal lawyer, Michael Cohen that was delivered to the White House.

… the Mogilevich connection: Sater’s father, Mikhail, is a convicted criminal and, according to US Supreme Court petition, a “Mogilevich crime syndicate boss.” (Update: After further reporting for my book, I no longer believe there is any credible evidence to support the claim that Sater is connected to Mogilevich.)

Anatoly Golubchik and Vadim Trincher: Russians serving  five years in prison for running an illegal sports betting ring in Trump Tower that catered primarily to Russian oligarchs. Trincher, a professional poker player, had a $5 million condo on the 63rd floor of Trump Tower. (A co-defendant of Golubchik and Trincher’s, Hillel (Helly) Nahmad, paid more than $21 million for the 51st floor of Trump Tower, where he ran a high stakes poker game that catered to millionaire and billionaire clients. Nahmad was sentenced to a year in prison.) According to an 84-page indictment, Trincher and Golubchik’s sports betting operated under the protection of “Vor” Alimzhan Tokhtakhounov, a Ukrainian-born Mafia Don who was a VIP guest at the 2013 Miss Universe pageant Trump hosted in Moscow. Tokhtakhounov,who lives in Russia, is also wanted for bribing Olympic officials in 2002 in Salt Lake City.

…the Mogilevich connection: Tokhatkhounov is described as close to Mogilevich by Interpol and other authorities.

Vyacheslav Kirillovich Ivankov: Born in the Soviet Republic of Georgia, Ivankov was a top Russian mob boss who arrived in New York in 1992. According to the FBI, he became one of the most powerful Russian Mafia bosses in America. The FBI tracked him down in a luxury apartment in Trump Tower, according to journalist Robert I. Friedman’s expose Red Mafiya. Invakov disappeared and then turned up again in Trump’s New Jersey casino, the Taj Mahal. Ivankov’s phone book included a working number for the Trump Organization’s Trump Tower residence, and a Trump Organization fax machine, according to Friedman. Ivankov was arrested in 1995 and sent to prison  for conspiring to extort $3.5 million from two Russian emigres who ran an investment advice company in lower Manhattan. After his release he returned to Russia where he was assassinated.

… the Mogilevich connection: Ivankov had a close relationship with Mogilevich, who paid a Russian judge for Ivankov’s early release from a Siberian prison where he was being held for robbery and torture, according to Alan A. Block’s study, All is Clouded by Desire.

David Bogatin: Russian native who was identified by law-enforcement officials as a member of Russian organized crime. In the early 1980s he ran a gasoline bootlegging scheme that was so lucrative that he spent nearly $6 million to buy five separate condos in Trump Tower. Trump personally sold him the condos, according to an investigation by journalist James S. Henry.  Bogatin worked with members of the Colombo family, according to Senate testimony.  Pleaded guilty to evading taxes on gasoline but jumped bail before he could be sentenced to prison. (Before he fled, he turned over the mortgages on his Trump Tower condos to a Genovese crime family associate, Friedman writes in Red Mafiya. The mortgages were liquidated and moved through a Mafia controlled bank in New York.) Bogatin surfaced in Poland as the owner of a bank and was extradited back to the United States. Sentenced to prison in 1992.

… the Mogilevich connection: the FBI considered Bogatin a key member of Mogilevich’s crime family.