Timeline of World History

'''WARNING: This article contains spoilers. Proceed at your own risk!'''

This is a list of historical events that occur in Made In Abyss. All dates are approximate, and calculated back from the start of the series (or the present time). Some dates may be incorrect due to time dilation caused by the Abyss.

6000 years ago: The first known group of Praying Skeletons is entombed within the Burial Tower.

4000 years ago:


 * The Wind-Riding Windmills in the 2nd Layer were built at least 4000 years ago and were used to catch updrafts.
 * The second known group of Praying Skeletons is entombed within the Burial Tower.

2000 years ago: The third (and most recent) known group of Praying Skeletons is entombed within the Burial Tower.

1900 years ago: The Abyss is discovered by the future inhabitants of Orth. It may have been discovered earlier by other groups, but this is unknown.

150 years ago: According to Wazukyan, the village of Ilblu is established. It is likely that it has been much longer than this on the surface, and that Wazukyan's perception of time has been altered by the Abyss.

50 years ago: Rumors begin circulating about Ozen, suggesting that she has been a White Whistle for at least 50 years, and was presumably born at least a decade or two before that.

15 years ago: Bondrewd steals the Special Grade Artifact Zoaholic.

12 years ago:


 * Lyza, Torka, and Ozen are dispatched on a special mission to the 4th Layer to retrieve the Unheard Bell. Torka does not survive the mission.
 * Riko is born.

10 years ago:


 * Bondrewd establishes the Ido Front base over the remains of an ancient altar in the deepest part of the 5th Layer.
 * Lyza descends to the 6th Layer on her Last Dive, leaving Riko in the care of Jiruo at Belchero Orphanage.

7 years ago: Mio visits Orth from overseas, encountering a 5-year-old Riko and her pet dog Reg.