The aim of this study was to summarize knowledge about the lichen biota found so far in Central Poland, to collect all data for published and previously unpublished lichens, and to prepare a list of taxa occurring in this region. Lichenicolous fungi and non-lichenized fungi allied to lichens are also included in the catalogue. 2. Central Poland: study area The boundaries of the territory defined in this work as Central Poland are accepted conventionally and correspond to the spatial scope of lichenological research I conducted from 1966 to 2016. Within the accepted boundaries, Central Poland is located between Włocławek town (52°39′39″N, 19°04′07″E) and Płock city (52°32′50″N, 19°42′00″E) in the north; Częstochowa city (50°49′04″N, 19°08′18″E) and Włoszczowa town (50°51′15″N, 19°58′01″E) in the south; Ostrzeszów town (51°25′30″N, 17°55′47″E), Gołuchów village along with the Gołuchów Arboretum (51°51′48″N, 17°55′33″E) and Kalisz town (51°45′45″N, 18°05′23″E) in the west; and the Modrzewina nature reserve close to Grójec town (51°50′24″N, 20°46′28″E)-the northernmost site of the subendemic Polish larch-Skarżysko-Kamienna town (51°06′59″N, 20°52′01″E) and Pakosław village close to Iłża town along with the Pakosław peatland (51°11′30″N, 21°10′32″E) in the east. In the physico-geographical division of Kondracki (2002), Central Poland is located in 35 mesoregions and 10 macroregions belonging to two high-ranking units, the Niż Środkowoeuropejski lowland and Wyżyny Polskie upland provinces. Within the Niż Środkowoeuropejski lowland, areas in the Pojezierze Wielkopolskie lakeland (three mesoregions belonging to three macroregions) and Niziny Środkowopolskie lowlands (21 mesoregions belonging to four macroregions) subprovinces were investigated. Within the Wyżyny Polskie uplands province the research included the Wyżyna Śląsko-Krakowska upland (two mesoregions belonging to one macroregion) and Wyżyna Środkowomałopolska upland (nine mesoregions belonging to two macroregions) subprovinces. The names of mesoregions and macroregions are specified under Distribution in Chapter 5. Central Poland is situated in the borders of four historical lands, Wielkopolska, Mazovia, Ziemia Wieluńska and Małopolska. On the border Mazovia and Wielkopolska is Łódź, the largest city in this part of the country, a centre for many scientific institutions, including the University of Łódź. The border of two macroregions passing through Łódź clearly divides the city into two parts in terms of geomorphology. The northeastern part rises to 281 m a.s.l. and belongs to the Wzniesienia Południowomazowieckie heights macroregion, within it the Wzniesienia Łódzkie heights mesoregion; outside it the southeastern part of the city belongs to the Wysoczyzna Bełchatowska high plain. The western part of Łódź, located much lower (up to 163 m a.s.l.), belongs to the Nizina Południowowielkopolska lowland macroregion and the Wysoczyzna Łaska high plain mesoregion. Central Poland is an area transitional between lowlands and uplands, having three types of relief and l...