Complex sentence: The diameter chrysanthemum crest, symbol of the Imperial Throne, was raised in 1953 but lost or scrapped shortly thereafter, and one of the 140 mm casemate guns was raised in 1963 and donated to the Yasukuni Shrine.
Split into simpler sentences: The diameter chrysanthemum crest, symbol of the Imperial Throne, was raised in 1953 but lost or scrapped shortly thereafter. One of the 140 mm casemate guns was raised in 1963 and donated to the Yasukuni Shrine.