Under the Seljuqs the "Iranian plan" of mosque construction appears for the first time. Lodging places called "khans", or caravanserai, for travellers and their animals, or caravansarais, generally displayed utilitarian rather than ornamental architecture, with rubble masonry, strong fortifications, and minimal comfort. Seljuq architecture synthesized various styles, both Iranian and Syrian, sometimes rendering precise attributions difficult. Another important architectural trend to arise in the Seljuk era is the development of mausolea including the tomb tower such as the Gunbad-i-qabus (circa 1006-7) (showcasing a Zoroastrian motif) and the domed square, an example of which is the tomb of the Samanids in the city of Bukhara (circa 943).