The family office of former Qatari Prime Minister Sheikh Hamad bin Jassim Al Thani announced considering the sale of luxury hotels in London and Paris valued at a total of about $869 million, according to people familiar with the matter.

Eastdil Secured LLC has been appointed to advise on the potential sale of the Hyatt Regency Paris Etoile hotel in Paris, which is owned by a company linked to the Qatari sheikh and valued at about €500 million ($557 million), said two of the people who asked not to be identified because the plans are private.

Broker Jones Lang LaSalle has been hired to evaluate the potential sale of the Sanderson and St Martins Lane hotels in London, valued at a combined 250 million pounds ($312 million) and owned by another company owned by HBJ, two other people said. A handful of investors have been approached by JLL regarding the London hotels, but there’s no certainty that a deal will take place.

Sheikh Hamad served as Qatar’s prime minister from 2007 to 2013 and was head of the Qatar Investment Authority, the country’s sovereign wealth fund. Both the fund and the Qatari royal family have been among the most prolific investors in luxury property in the world, snapping up trophy hotels, office buildings and stores in cities including London, Paris and New York.

The Sanderson and St Martins Lane hotels in London’s Soho and Covent Garden districts were last traded in 2011 for about 192 million pounds, according to a filing from QInvest LLC, the Qatari bank that advised on and helped finance the deal. The Hyatt Regency Paris Etoile is one of the tallest buildings in central Paris and boasts almost 1,000 rooms.