Estonian Ambassador Kristjan Prikk and his wife Liis were honorary patrons at Choral Arts Society of Washington’s annual holiday concert and gala at the John F. Kennedy Center for the Performing Arts on Dec. 16. Now in its 44th year, the event titled “O Night Divine” charmed guests with Christmas music by the Choral Arts Symphonic Chorus and Orchestra, followed by a silent auction and dinner on the roof terrace.