Asara: Die Gaben des Kalifen (The Caliph's Gifts), an expansion included in the 2011 Wolfgang Kramer Almanach published by Spielbox, can be used with both the basic and advanced Asara game.
For the basic game, five locations on the board (such as the middle section of the window and the +8 space of the bank) are marked with treasure chest markers. One card from a deck of 20 is placed face-up next to each space. Whenever a player goes to one of these spaces with a buyer, he takes the card, and executes the action shown on the card: acquire 4-6 gold, buy one tower tile of the depicted type (top, middle or bottom), earn two prestige points, or choose one buyer from the deck. At the end of each year, each location receives a new card (in addition to the ones still there).
In the advanced game, one of the spaces in the "House of the Lighted Windows" is marked with a treasure chest marker as well, and also receives cards with bonus actions. In addition, four cards are added to the deck which force a player to buy a lighted window at a cost of four gold when he visits the space.