You can add the Alhambra even though its construction began in 1238. It can be a royal palace or a garden (The Nasrid gardens). Thanks for this fantastic mod by the way

Al-Qasr (Palace or fortress) in Palermo 9th century, Great Mosque of Samarra, Fortress of Al-Ukhaidir in Karbala in Iraq, Alcazaba of Málaga, Great Mosque of Mahdiya in Tunisia, Burana Tower in Balasgun, Al-Rusafa garden in Syria, Dar al-Bahr garden in Hammadid Algeria, University of al-Qarawiyyin in Karaouine, Masjid al-Andalusiyyin in Fez built 859 by Idrisids, Aljafería (Palace or fortress) in Zaragoza.

Also wanted: Ortygia (Harbor) in Syracuse, Tower of Hercules (Roman Lighthouse) in A Coruna, Piazza San Marco (Harbor) in Venice, Krak des Chevaliers (crusader fortress) in Tolosa (wrong period), Synagogue of Toledo 1180, Alte Synagogue Erfurt in Germany 1094.

https://en.wikipedia.org/wiki/Buddhas_of_Bamyan

"Bamian Buddha Statues" in Bamian, Afghanistan. While technically not Muslim, they are very related in an albeit somewhat antagonistic way. Today they have become very iconic of Afghanistans pre-Islamic heritage. Perhaps they could be included? Could even use the special statue model.