 <unk> <unk> Monument 23 dates to the Middle <unk> period , and is found in <unk> <unk> , an important city in the foothills of the <unk> Pacific coast , in the modern department of <unk> . It appears to be an <unk> @-@ style colossal head re @-@ carved into a niche figure sculpture . If originally a colossal head then it would be the only known example from outside the <unk> <unk> . 
