Complex sentence: The museum exhibits approximately 2500 items related to the maritime history of Greece from prehistoric times to the present day and include many ship models and a number of paintings from the late 19th and early 20th centuries.
Split into simpler sentences: The museum exhibits approximately 2500 items related to the maritime history of Greece from prehistoric times to the present day. They include many ship models and a number of paintings from the late 19th and early 20th centuries.