Lamanai: Structure N10-43
"Structure N10-43 has been the scene of major [archaeological] efforts in the past four seasons, with the result that we have now examined virtually all of the construction sequence, much of which can be dated securely. We now know that, while the final major modification to the front of N10-43 took place in Late Classic times, the bulk of the construction is Pre-Classic. N10-43 is, therefore, with its height of 33 m., the largest securely dated Pre-Classic structure known in the Maya Area, a fact that has obvious implications for our assessment of the early importance of Lamanai in the Maya lowlands."
Pendergast, Journal of Field Archaeology 8:1 41