Bastion II was built before 1605 in accordance with Bernardo Morando’s design and then supplemented with flank
casemates and posterns* by Andrea dell’Aqua (1618-23). On a long section of a straight curtain wall between Bastions I and III, the bastion assumed a flattened form, called “piatta forma”*. Pursuant to plans dating from 1777 and the end of the 18th century and stored in Kriegsarchiv in Vienna, there was a Renaissance garden in the central part of bastion platform. When the fortress was being modernised at the time of the Duchy of Warsaw, a bastion-shaped
lunette* was built in the foreground. Mallet-Malletski continued modernization works in the 1820s. By a weir built earlier, a bridge appeared which joined the area to the covered way leading to the Rotunda. When the fortress was liquidated in 1867, the bastion was partly demolished but flank casemates, some posterns and small fragments of the walls have been preserved. They were measured by J. Zachwatowicz in the 1930s.
Curtain wall I-II was made as an earthen fortification before 1591 and reinforced with a masonry wall on the outside soon afterwards. Before 1704, it was modernized by Jan Michał Link (the plan made at that time represents three firing ranges in the breastwork, near the orillon of Bastion II). On the plan dating from 1777, the location of Furta Wodna was marked; it may have been built at that time although architectural research has shown that it was built in 1813-20. In 1824 a
haxo casemate* was added at the level of the covered way with two firing ranges. In 1826-27 a ravelin and an earthen embankment was built as well as a lock in the moat. In the 1840s trees were planted between the curtain wall and the berm. When the fortress was liquidated in 1866, the curtain wall was destroyed and the foreground of the ravelin levelled. The plan dating from 1868 shows that Furta Wodna was not destroyed then but fell into ruin to be rebuilt in 1980-84