Complete the following sentence: This grand boulevard was built to replace the city walls, which had been built during the 13th century and funded by the ransom payment derived from the release of Richard the Lion Heart, Richard I of England and reinforced as a consequence of the
️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Under Emperor Joseph II, streets and walkways were built in the glacis, lit by lanterns and lined by trees. ️<unk>️<unk>️<unk>️<unk>️ But the Revolution of 1848 was required to trigger a more significant change.<unk>But the Revolution of 1848 was required to trigger a more significant change.