Clarification: "San Antonio de Padua" — Not a Building in the US

There is no notable building, mission, or church named "San Antonio de Padua" in the United States (or generally by that exact name). The query likely confuses one of the following:

1. Mission San Antonio de Padua (California)

• Full Name: Mission San Antonio de Padua (Saint Anthony of Padua).
• Location: Jolon, California (Monterey County), on Fort Hunter Liggett military base.
• Founded: 1771 (3rd mission) by Junípero Serra.
• Purpose: Convert Salinan people, establish Spanish claim, agriculture (wheat, olives, livestock).
• Status: Active parish, retreat center, museum. Restored 1903–1907, 1940s. Requires base access (check Fort Hunter Liggett website for visitor passes).

2. Basilica of Saint Anthony of Padua (Italy)

• Location: Padua (Padova), Veneto, Italy.
• Significance: Major pilgrimage site housing the tomb of St. Anthony of Padua (1195–1231), Portuguese Franciscan, Doctor of the Church.
• Architecture: Byzantine-Romanesque-Gothic, 8 domes, relics (tongue, jaw, vocal cords).

3. San Antonio, Texas (Named for Him)

• City named after the San Antonio River, named by Spanish explorers on St. Anthony's feast day (June 13, 1691). Mission San Antonio de Valero (The Alamo) founded 1718.

4. Other "San Antonio" Missions in California

• Mission San Antonio de Pala (Pala, CA — asistencia of Mission San Luis Rey).

If you meant the California Mission: It was built to expand Spanish colonial control, convert Native Americans, and develop agriculture. If you meant the Basilica in Padua: built to enshrine the saint's relics. Please clarify the specific site of interest.