Historians of the Ancient Near East agree that David probably existed around 1000 BCE, but that there is little that can be said about him as a historical figure. It was initially thought that there was no evidence outside of the Bible concerning David, but the Tel Dan Stele, an inscribed stone erected by a king of Damascus in the late 9th/early 8th centuries BCE to commemorate his victory over two enemy kings, contains the phrase in Hebrew: ביתדוד, bytdwd, which most scholars translate as "House of David".
Statue of King David (1609-1612) by Nicolas Cordier in the Borghese Chapel of the Basilica di Santa Maria Maggiore in Rome, Italy https://en.wikipedia.org/wiki/David
David by Michelangelo. 1501-1504. Dimensions: 517 cm × 199 cm. Location: Galleria dell'Accademia, Florence, Italy https://en.wikipedia.org/wiki/David https://en.wikipedia.org/wiki/David_(Michelangelo)
Youthful David, triumphantly posed over the head of the slain Goliath. Andrea del Verrocchio's. Bronze statue. 1473 and 1475. Museo Nazionale del Bargello, Florence. It is sometimes claimed that Verrocchio modeled the statue after his pupil Leonardo da Vinci. https://en.wikipedia.org/wiki/David_(Verrocchio)
David raises the head of Goliath as illustrated by Josephine Pollard (1899) https://en.wikipedia.org/wiki/David