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Arnold Schwarzenegger, and his big belt buckle, greeted fans outside his hotel in Wien, Austria ... which happens to be his homeland.

The 63-year-old Total Recall star flew to Austria to give a speech at the Vienna Energy Forum. As predicted, Arnold stayed mum regarding his relationship with housekeeper Mildred Baena and his illegitimate son.

Meanwhile back here in Los Angeles, Arnold's estranged wife Maria Shriver is still considering divorce.

Keep smilin', Arnold.