Margie Winters said Monday she hopes the pontiff will address issues facing gay Catholics during his visit to the U.S. this week.
The 50-year-old Winters says she lost her job this year at a private Catholic grade school outside Philadelphia over her 2007 same-sex marriage.
Thousands of people from diverse social and religious backgrounds are expected to attend the welcoming ceremony Wednesday on the South Lawn.
She says her invitation came through the Human Rights Campaign, an LGBT advocacy group.
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