anyone?

MA in arch history? You could probably teach art/architectural history at the community college level with that degree. Be aware that the competition for teaching positions is currently the fiercest it has ever been.

to teach arch history, you really need to have a PhD. if your master's degree was in arch design, you could potentially find something if you had a connection, but even for those positions extensive experience in practice and/or a phd is necessary.

"Teaching" can be anything from a full-time, tenure-track academic career path to part-time contract work semester-to-semester, to one-time instruction of a particular course.

There's a glut of PhDs on the job market these days (I speak from experience), and architectural history is one of those curricular areas where a doctorate is commonly required.  Certainly this true for full-time TT positions.  For short-term contract teaching, it's possible that an MA might suffice if everything else about your CV fit the bill of a particular department at that moment.

Otherwise, the community-college system is probably a good place to look.  That educational sphere is perfectly honorable, if somewhat different in demographics.  Recent PhD graduates are applying for more of those jobs these days, too.

Best of luck to you...

Teaching, good luck on that thought, you had better dream of a working architect position in Hong Kong!

Think about what you want from life careerwise. If you want to go into teaching that's fine. I personally wouldn't do that