Complex sentence: Built in three stages, the first section was constructed in 1788 to a height of 10.66 metres (35 ft); a further 4.26 metres (14 ft) was added in 1888, and the final 3.82 metres (12.5 ft) was added in 1900.
Split into simpler sentences: Built in three stages, the first section was constructed in 1788 to a height of 10.66 metres (35 ft). A further 4.26 metres (14 ft) was added in 1888, and the final 3.82 metres (12.5 ft) was added in 1900.