Candi Mendut is located some 2 miles east of its more popular cousin, Candi Borobudur. It was built around 800 A.D by the Kings of Syailendra Dynasty, the same kingdom that built the world-famous Candi Borobudur some years later.

Picture: www.flickr.com
If you go inside the compound after paying the minimal entrance fee of about Rp3.000, you can see three big statues enclosed in the square-shaped temple:
1. Cakyamuni (Sitting in cross-legged with dharma cakra mudra position ie: turning the wheel of dharma hand gesture),
2. Awalokiteswara (A bodhi satwa as a human helper), and
3. Maitreya (The savior of humans for the future).

Picyure: asiafinest.com
Candi Mendut (Mendut Temple) is frequently used to celebrate the Waisak day every May full moon and the pilgrims from Indonesia and all parts of the world come to this ceremony.
It is older than Candi Borobudur. Its architecture is square, and having an entrance on its steps. Its roof is also square and terraced. There are stupas (= bell-shaped structures) on it.
Source: java.uluwatu.org & yogyes.com