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Cement is a newly introduced building material. With its help Roland built first defensive wall in less than 3 months and renovated entire residense districts.
Due to lack of technology Roland decided to use Anna's magic power to sustain constant temperature at iron melting point. For this purpose he built brick house 15 m long and 4 m wide with two doors on opposite sides. From one side workers brought raw materials, while from other Anna entered the room. To obtain cement Roland mixed limestone powder and clay powder with water and spread paste evenly on the floor, then Anna heated the ground under paste until iron bar was melted. The resulting gray ash was mixed with river sand in ration 3:1 to get cement mortar.