The lowest temple is astronomically aligned and thus was probably used as an astronomical observation and/or calendrical site.
 On the vernal and the autumnal equinox sunlight passes through the main doorway and lights up the major axis.
On the solstices sunlight illuminates the edges of megaliths to the left and right of this doorway.

Although there are no written records to indicate the purpose of these structures, archaeologists have inferred their use from ceremonial objects found within them: sacrificial flint knives and rope holes that were possibly used to constrain animals for sacrifice (since various animal bones were found).
These structures were not used as tombs since no human remains were found.
 The temples contain furniture such as stone benches and tables that give clues to their use.
Many artifacts were recovered from within the temples suggesting that these temples were used for religious purposes, perhaps to heal illness and/or to promote fertility.
The lowest temple is astronomically aligned and thus was probably used as an astronomical observation and/or calendrical site.  On the vernal and the autumnal equinox sunlight passes through the main doorway and lights up the major axis. On the solstices sunlight illuminates the edges of megaliths to the left and right of this doorway.
Although there are no written records to indicate the purpose of these structures, archaeologists have inferred their use from ceremonial objects found within them: sacrificial flint knives and rope holes that were possibly used to constrain animals for sacrifice (since various animal bones were found). These structures were not used as tombs since no human remains were found.  The temples contain furniture such as stone benches and tables that give clues to their use. Many artifacts were recovered from within the temples suggesting that these temples were used for religious purposes, perhaps to heal illness and/or to promote fertility.
Mnajdra