On Thursday, William will complete his stay by visiting historical and religious sites in Jerusalem.
Wearing a black Jewish skullcap, William, second in line to the throne, laid a wreath in the Hall of Remembrance at the Yad Vashem memorial, where an eternal flame flickers and the names of extermination and concentration camps are engraved in the floor.
Before he embarked on the next leg of his journey, which includes Israel and the Occupied Palestinian Territories, William couldn't pass up the opportunity to recreate a photo his wife took in that very spot over 30 years ago, when she and her family lived Jordan for three years.
At Yad Vashem, William signed a guest book in which he noted with pride that his great-grandmother, Princess Alice, had been honoured by the institution as one of "the righteous among the nations" for sheltering Jews in her home in Greece during the Holocaust.
There, he's scheduled to visit Yad Vashem, the World Holocaust Remembrance Center, and meet with both Israeli Prime Minister Benjamin Netanyahu and President Reuven Rivlin.
Thanks to her, the Cohen family survived and today lives in France, it said.
In signing the Yad Vashem guestbook, the prince called it a "profoundly moving experience" and said the Holocaust was "almost impossible to comprehend".
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In my life things have never been easy, would not be now right! The dream - no, the OBJECTIVE - is still alive. Frustrated into stoppage time, the breakthrough finally arrived via a deft finish from Coutinho.
Prince William, Duke of Cambridge, arrived in Israel Monday night, marking the first-ever official visit by a member of the British royal family to the Holy Land, which was ruled by London from 1922 until 1948 under the British Mandate.
The prince also meets Netanyahu on Tuesday and will see Palestinian Authority President Mahmoud Abbas in the West Bank during the trip.
Prince William will continue his "non-political" trip of the Middle East, through Jordan, Israel and Palestine, before heading to the Dar Na'mah Centre.
The Palestinians are also eager to welcome the prince, hoping his visit will give them a boost as they struggle with a Trump administration they consider biased toward Israel. The Palestinians claim east Jerusalem as their future capital.
Prince William will then attend an event in central Tel Aviv where Tel Aviv Mayor Ron Hulda will be present, and finish his day at UK Ambassador David Quarrey's residence in Ramat Gan.
His day will round off with a visit to the city of Jaffa, where he will meet young Arab and Jewish Israelis playing football together, and will join them in a penalty shoot-out.