Adelson, Israeli Envoy Dermer and Giuliani Hobnob at Trump's D.C. Gala

Days before inauguration, foreign diplomats, Republican leaders and donors attend president-elect's first event in Washington in more than a month.

Rudy Giuliani speaks with Sheldon Adelson and wife Miriam at the 'Chairman's Global Dinner' in Washington, D.C., U.S., January. 17, 2017.
Kevin Dietsch/Bloomberg

WASHINGTON, D.C. - Less than 72 hours before his inaugural ceremony, U.S. President-elect Donald Trump held a festive gala dinner in Washington D.C., hosting about 500 guests, including some of his cabinet picks, Republican Congressional leaders, top donors and diplomats from dozens of countries.

Among the attendees at the event, officially named "The Chairman's Global Dinner," were casino magnate Sheldon Adelson and his wife, Miriam, two top donors who contributed to Trump in the last stages of his presidential campaign.

Sheldon Adelson's name has made headlines in recent weeks in Israel in connection to a corruption investigation involving Prime Minister Benjamin Netanyahu and the country's two largest newspapers, Yedioth Ahronoth and Israel Hayom, the latter owned by Adelson.

Ron Dermer, left, former New York City Mayor Rudy Giuliani, right, and Sheldon Adelson, middle, at a dinner gala held by Donald Trump in Washington, D.C., January 17, 2017.

A photograph from the event shows Adelson speaking with former New York City Mayor Rudi Giuliani, one of Trump's main surrogates during the campaign, while Israeli ambassador to the U.S., Ron Dermer, stands beside them.

Some 150 diplomats from embassies and institutions in Washington were invited to the dinner, according to the New York Times. "We have great respect for your countries; we have great respect for our world," Trump told them at the Gala.

For Trump, Tuesday's gala dinner was the first event he held in Washington in more than a month. At the end of the night the president-elect did not stay in D.C. and instead flew back to New York City to his apartment in Trump Tower on Fifth Avenue.

The dinner was held at the Andrew W. Mellon Auditorium, only a mile away from the White House, which Trump will enter on Friday afternoon. Trump is expected to return to Washington on Thursday morning, when events kicking-off the presidential inauguration are set to begin.