Halle 45 hosts congresses, conferences, trade fairs, corporate galas and concerts for up to 2,000 people in a 4,365-square-meter hall, with smaller venues across the street for groups of 60 to 150. The site is the former Waggonfabrik in Mainz-Mombach, a railcar and vehicle works whose hall 6345 has hosted events since 1998.
Seminars and company events
The main hall holds 2,000 standing or in rows, and 1,200 for a parliamentary layout, a gala or long tables. It can be turned into a room-in-room setup of up to nine rooms with little effort, so a congress can run a plenary and breakouts under one roof. Recent bookings include the ROWE corporate gala, the MEDIALOG trade fair and the RLP NEXT congress, along with conventions, an automotive event and a bicycle fair. Across the street, four further venues add about 2,000 square meters for workshops, side meetings, livestreams and back offices, and the site counts 18 side and meeting rooms in all. All-in Christmas packages are offered in the Auktionshaus from 50 guests and in Halle 45 from 150.
Rooms and capacities
Halle 45 has 4,800 square meters gross and 4,365 of event space, step-free access, vehicle access from two sides, a floor load of 40 tonnes, 90 centrally controlled Cameo W600 lights, Wi-Fi up to 1 Gbit and a 200-square-meter terrace. Bar 45 and the Konferenzebene sit within it. The Konferenzebene, on the first floor, has two rooms, Lindenberg and Kurt Cobain, with 225 square meters for up to 75 people, many windows, sound insulation from the hall and its own entrance.
The Auktionshaus offers 383 square meters on the ground floor: a 200-square-meter main room, a 57-square-meter side room and a 98-square-meter open gallery for a lounge. It takes 150 standing or in rows, 132 at long tables and 80 for a gala, with a fixed bar, a 4 by 2.5 meter LED screen and outdoor space.
The Turbinenhalle, 190 square meters, takes 150 standing and 120 in rows, with a roller door for deliveries and acoustic isolation. The Motorenhalle, 275 square meters, takes 150 standing and opens onto the Kesselhaus; it is being modernized until 2027. The Werkzentrale, 180 square meters, has five meeting rooms, a reception area and a kitchen for up to 60 people.
History and setting
Anton Gastl founded a saddlery for the electoral court here in 1777. From 1845 the Gastell brothers built rail and tram cars, then bus and car bodies, with about 1,200 workers by 1912. Bombing destroyed 22 halls in the Second World War, and hall 6345 was the first rebuilt. KHD, IVECO and then Mainz Industries Panzerwerke, which repaired US military vehicles, ran the site until 1994. From 1998 the hall served the Mainz State Theatre, then became the Phönix-Halle. After it closed in 2015, the initiative "Rettet den Phönix" saved it, and it reopened as HALLE 45, its building number without the 63.
Getting there
The address is Hauptstraße 17-19, 55120 Mainz. Mainz Hauptbahnhof is about 7 minutes by tram, and Frankfurt Airport about 30 km away. Visitors park in lots P1 and P2, with shuttles from larger lots at the Mewa Arena and the trade fair grounds. The Mainz-Mombach exit on the A643 is about 1 km away.





