1. The Church and Crypt of Ayios Dimitrios are one of the most significant religious landmarks in Thessaloniki, Greece. The church is dedicated to St. Demetrius, who is the patron saint of the city. The present-day church was built on the site of an earlier church that was destroyed by fire in 1917. The church features an impressive Byzantine-style architecture with beautiful frescoes and mosaics. The crypt below the church houses an archaeological museum with exhibits showcasing the history of the city from the Roman times.

Interesting facts about the Church and Crypt of Ayios Dimitrios include:

- The church is believed to contain the relics of St. Demetrius, which are considered to have miraculous powers.

- The church was converted into a mosque during the Ottoman rule in the 16th century.

- The crypt contains the remains of a Roman bathhouse that dates back to the 2nd century AD.

- The frescoes and mosaics in the church depict scenes from the life of St. Demetrius and other biblical stories.

2. The Church and Crypt of Ayios Dimitrios are open from Monday to Sunday, from 8:00 am to 8:00 pm. Their phone number is +30 231 025 0116.

3. The admission fee for the Church and Crypt of Ayios Dimitrios is €6 for adults and €3 for students and seniors. Children under the age of 18 and disabled visitors can enter for free. The church is located in the city center, and visitors can reach it by bus, taxi, or on foot. There are several parking options nearby, including a parking lot across the street from the church.