In "Zeus", monuments are replaced by Sanctuaries to each god and goddess of Olympus, in which only three materials are used (Marble, wood and bronze sculptures) and all work is done by artisans from an Artisans' Guild. However, prior to building the Sanctuary, the site placement has not only a cost of drachmas (The game's currency), but also mined marble for the base and floor. This is further expanded in the "Poseidon" expansion, with the introduction of Black Marble and Orichalc, as well as the construction of some stepped pyramid-like monuments. Building these sanctuaries, however, is beneficial and encouraged, as the adored gods and goddesses can walk across the city, blessing structures along the way, each type according to said god/goddess (Athena, as a prime example, can bless Olive Oil industries, boosting production). Some gods can even intervene directly in case of attacks by hostile gods, monsters or rival armies.