The nave of the structure consists of three aisles divided by two rows of eight columns. It has an overall floor area of 69.37 m × 22.85 m (227.6 ft × 75.0 ft) with a maximum height of 16.02 m (52.6 ft). The tower is 85 m (279 ft) high and at one time was part of the medieval city fortifications.[1] The cathedral is constructed in the traditional crucifix shape.