1. The Córdoba Synagogue, also known as Sinagoga de Córdoba, is a historic synagogue located in the Jewish Quarter of Cordoba, Spain. It is considered one of the oldest synagogues in Europe that has been preserved.

The synagogue dates back to the 14th century and was likely built on the site of an earlier synagogue dating back to the 9th century. It is a Mudejar-style building, blending Islamic and Christian architectural influences, which was common in Andalusia during that time. The synagogue features beautiful tilework, horseshoe arches, and intricately carved wooden ceilings.

One interesting fact about the Cordoba Synagogue is that it was used as a secret place of worship during periods of oppression against Jews. It was hidden behind the walls of a residential building, and the entrance was deliberately made small to keep it inconspicuous.

2. The working hours of the Cordoba Synagogue can vary, so it is recommended to check the official website or call ahead for the most up-to-date information. Here is the contact information:

Address: Calle Judíos, 20, 14004 Córdoba, Spain

Phone: +34 957 42 04 13

3. Ticket information and transportation:

- Admission to the Cordoba Synagogue is included in the entrance ticket for the Jewish Quarter (Judería) which also grants access to other nearby attractions like the Casa de Sefarad and the Casa Andalusí. Visitors can purchase a ticket at any of these sites.

- The closest bus stop to the synagogue is \"Puerta de Almodóvar,\" which is served by several bus lines. From there, it is a short walk to the Jewish Quarter.

- Cordoba is easily accessible by train from major cities in Spain, including Madrid and Seville. The synagogue is within walking distance from the Cordoba train station.