The Spain people discovered Alta (upper) California where the missions are now and they didn't want anyone to claim their land so they built missions to protect Alta California.
Missions
Spain started to build missions in Texas around 1690.
Currently all missions to Mars are unmanned. The only human aspect of these missions are the scientist and engineers that build the satellites or rovers/landers and the people that control them (mission control).
The person who was sent to Spain to build missions was father Serra
he helped build some missions and he found 21 missions one of them is the San Diego mission
Stones and mud,and dirt
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by serra
Why?
"To help our customers build richer relationships and networks with the people and things that matter to them most"
father serra built i think 9 missions.
About 1690.