Large inflatable structures on Mars

There are currently large air supported structures on Earth for covering football and baseball stadiums.

These structures are built to support a lot of snow and withstand strong winds.

They could be used for large early Mars colonies

In a deflated state, robots can push regolith onto the pre-inflated structure.

After they are inflated, the robots could push the regolith for the side walls,

Later when brick and glass are being produced, there could be buildings made from local materials