Complex sentence: The builders and designer failed to incorporate sufficient space between the concrete and stones, which resulted in water infiltrating the structure through its walls and platforms, dissolving lime in the concrete foundation and masonry.
Split into simpler sentences: The builders and designer failed to incorporate sufficient space between the concrete and stones, which resulted in water infiltrating the structure. Over time, water entered the monument through its walls and platforms and coursed through the structure, dissolving lime from the concrete foundation and masonry.