Pope Pius IX was the longest-reigning pope of the Catholic church.

Pie-IX may also refer to:

• Pie-IX Boulevard, a thoroughfare in Montreal, Quebec
• Pie IX Bridge, a bridge connecting Montreal with Laval, Quebec
• Pie-IX (Montreal Metro), a rapid transit station on the Green Line of the Montreal Metro
• Pie IX, a song by Montreal band Suuns from their album Zeroes QC

This disambiguation page lists articles associated with the title Pie-IX.
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