What is Concert hall?
[[Image:Wien Konzerthaus Mai 2003.jpg|thumb|The large hall of the [[Wien Konzerthaus]] (Vienna Concert House). The stage is off to the left of the photo.]] A '''concert hall''' is a place where [[concert]]s of [[classical music]] take place. “Concert hall” can either mean the actual room where the concerts takes place, or the whole building. The hall where the concerts are held may have a “stage” (where the performers are) and there will be an “auditorium” where the [[audience]] sits. Some concert halls are purpose-built. That means they were built to be concert halls. Other concert halls may have been something else many years ago, e.g. a Corn Exchange (a place where farmers used to sell their [[corn]]) and the building has later been changed into a concert hall. Purpose-built concert halls started about the beginning of the [[20th century]]. At that time scientists began to understand the importance of good [[acoustics]] (somewhere where the sound was good). Concert halls that are purpose-built usually have fixed seating (seats that cannot be moved). Some halls may have seats that can be moved, either by stacking them in small piles, or tiered seating that can fold up. This allows the hall to be used for other things, e.g. [[dancing]]. [[Image:Philharmonie 1a.jpg|thumb|left|[[Berlin Philharmonie]] was built in the 1980s in Berlin as a home for the [[Berlin Philharmonic]] Orchestra]] A concert hall is usually a big hall: big enough for an [[orchestra]] to be on the stage. A small concert hall, designed for just a few performers (as in [[chamber music]]) may be called a “recital hall”. Some concert halls are especially famous. In London there is the [[Royal Festival Hall]] on the banks of the river [[Thames]], the [[Barbican Centre]] in the City (near [[St Paul’s Cathedral]]) and the [[Royal Albert Hall]] in Kensington which is used for other events as well. There is also a famous recital hall called the [[Wigmore Hall]]. [[New York (state)|New York]] has the [[Carnegie Hall]], Vienna has the [[V