This answer to this riddle is "Shaolin." However, the answer notion that it is the cradle of oriental Martial Arts is incorrect. China has martial arts long before the monks of Shaolin took up unarmed boxing in the 17th-century. Japan and Korea have records attesting to wars between various warriors, so they too had martial arts long before this time.
Nobody specifically built it but the cradle of civilization is typically known as the Indus River Valley in west India.
A newton's cradle, an accelerator
the satue of liberety was built in the 18 century
a 15th century is smaller than a ship built in the 20th century
The Ajanta Caves were built from the 2nd Century to about 7th Century.
It was built in the 12th century.
it was built in the 13th century
it was built in 16 century.
It was built in the 11th century
The Southsea Castle was built in 1544 A.D., which was in the 16th century A.D.
20th century
built in fifth century BC