"an advanced version of what time-keeping system was developed by the ancient maya in or obelisk

Maya calendar is referred to as a calendar system that is used in Mesoamerica and other moderns communities near Guatemalan highlands.

Explanation:

Maya calendar is referred to as a calendar system that is used in Mesoamerica and other moderns communities near Guatemalan highlands.

Maya developed this system of calendars to keep the track of time periods which Maya termed as Long calendars. The purpose behind keeping track of a long period is to track the average world age by evaluating a great circle which is equivalent to 13 baktuns.

probably 3 since archeologists and historians don’t understand there writing.

a. he allowed the people he conquered to keep their customs and religions.

he captured babylon and freed the jewish people to return to judah.