This photo taken on March 20, 2026 shows an outside view of the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)

This photo taken on March 20, 2026 shows a window decoration inside the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)

This photo taken on March 20, 2026 shows an outside view of the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)

This photo taken on March 20, 2026 shows a dome inside the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)

This photo taken on March 20, 2026 shows a decoration inside the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)

This photo taken on March 20, 2026 shows an outside view of the Diri Baba Mausoleum in Gobustan, Azerbaijan. Built in 1402, this historical building has been taken under state protection as an architectural monument of national importance. (Xinhua/Chen Junfeng)