Prince Mohammed bin Salman bin Abdulaziz, Saudi Crown Prince and Prime Minister, accompanied on Tuesday US President Donald Trump on a tour of Diriyah.
The tour included the At-Turaif Historic District, a UNESCO World Heritage site and the birthplace of the Saudi state.
The Crown Prince and Trump watched a traditional Saudi folk performance and posed for a commemorative photo in front of Salwa Palace, the former seat of governance during the First Saudi State.
The tour also featured a presentation on the Diriyah Project.
Trump had arrived in Saudi Arabia on Tuesday – the first stop of a tour of the Gulf that will take him to Qatar and the United Arab Emirates.
Speaking at the Saudi-US Investment Forum earlier, he hailed the partnership between Riyadh and Washington, saying their relationship "has been a bedrock of security and prosperity."