The name of the group originates from the Latin word "quidam" meaning "someone, some human being" and refers to the poem "Quidam" by Cyprian Kamil Norwid, perhaps the most intriguing of Polish romantic poets. The title hero of that poem is a man looking for his place in life, searching for goodness and truth.

Polish progband founded in 1991.
Their style is a melodic, text-based (started with female vocals) symphonic rock. The rhythms intensify, the symphonic keyboard textures thicken and the electric guitar plays long melancholic notes.

Quidam (1996):

Emila "Iza" Derkowska – vocals, cello, flute
Ewa Smarzynska – flute
Zbyszek "Zibi" Florek – keyboards
Rafal "Makow" Jermakow – drums, percussion
Maciek "Maciecz" Meller – guitars
Radek "Tysy" Scholl – bass
Angels' Dreams (1998) :
Emilia Derkowska – vocal, backing vocals, cello
Zbyszek Florek – piano, keyboards
Maciej Meller – guitars
Jacek Zasada – flutes After
Radek Scholl – bass guitar
Rafal Jermakow – drums, percussions
Guest musician
Witold Ekielski – oboe in "Beznogi maly ptak", "Lza", "Pod Powieka"
Michal Wojciechowski – bassoon in "Beznogi maly ptak"
Malgorzata Lachowicz – violin in "Jest taki samotny dom"
Karolina Chwistek – violin in "Jest taki samotny dom"
Magdalena Wróbel – viola in "Jest taki samotny dom"
Dominika Miecznikowska – cello in "Jest taki samotny dom"
Sny aniolów (Angels' Dreams - Polish version) (1998)
Baja Prog – Live in Mexico (1999):
Emilia Derkowska – vocal, backing vocals
Zbyszek Florek – piano, keyboards
Maciej Meller – guitars
Radek Scholl – bass guitar
Jacek Zasada – flutes
Rafal Jermakow – drums, percussions
The Time Beneath The Sky (2002):
Emilia Derkowska – vocal, backing vocals
Zbyszek Florek – keyboards
Maciej Meller – guitars
Jacek Zasada – flutes
Radek Scholl – bass guitar
Rafal Jermakow – drums
Guest musician
Monika Margielewska – oboe "Letter From The Desert I"
Milosz Gawrylkiewicz – flugelhorn "Still Waiting (Letter From The Desert II)"
Grzegorz Nadolny – contrabass "You Are (In The Labyrinth Of Thoughts)"
SurREvival (2005) :
Zbyszek Florek – keyboards, mixing
Maciek Meller – guitars
Bartek Kossowicz – vocals, backing vocals
Mariusz Ziólkowski – bass guitar After
Maciek Wróblewski – drums
Jacek Zasada – flutes
Guests
Robert "Myca" Kowalski – backing vocals "Hands off", "Not so close", "The fifth season"
Grzegorz Nadolny – double-bass "The fifth season"
Pawel "DJ Paulo" Molenda – scratching "Queen of Moulin Rouge"
Alone Together (2007):
Zbyszek Florek – keyboards, backing vocals, mixing
Maciek Meller – guitars, backing vocals
Bartek Kossowicz – vocals, backing vocals
Mariusz Ziólkowski – bass guitar, backing vocals After
Maciek Wróblewski – drums, percussion
Jacek Zasada – flutes After
and:
Emila Nazaruk – backing vocals on "Kinds of Solitude at Night"
Piotr Nazaruk – xaphoon on "Different" and zither on "Kinds of Solitude at Night"
Piotr Rogóz – alto sax on "We Lost"
Michal Florczak – cover art and booklet design
Joachim Krukowski – mixing
The Fifth Season – Live In Concert (2009):
Zbyszek Florek – keyboards
Maciek Meller – guitars
Bartek Kossowicz – vocals, backing vocals
Mariusz Ziólkowski – bass guitar (also in After)
Maciek Wróblewski – drums
Jacek Zasada – flutes After

Current members;
Zbyszek Florek – keyboards, backing vocals
Bartek Kossowicz – vocals
Maciek Meller – guitars, backing vocals
Maciek Wróblewski – drums
Jacek Zasada – flutes, percussion After
Mariusz Ziólkowski – bass guitar (also in After)
They released on 26 March 2010 a dvd + 2cd called Strong Together.

Quidm will play at Rosfest 2011!

Session, solo:
Bartek Kossowicz: The D Project ('11).

http://www.myspace.com/quidampl