PT Journal AU Rykl, M Bartos, L TI Too many portals and staircases, or the communication rigmarole in the house No. 506 and 507 at the Havel's Market in PragueZu viele Portale und Treppen. Die Kommunikationsperipetien im Hause Nr. Konskr. 506, 507/I in der Havelska G SO Staleta Praha PY 2018 BP 2 EP 49 VL 34 IS 2 DI 10.56112/sp.2018.2.01 WP https://staletapraha.cz/en/artkey/pha-201802-0001.php DE town house - house layout - communication scheme - building history - Havel's town - cellar - basement - semi basement - layout SN 02316056 AB A survey of the house basement at The Havel's market revealed surprisingly detailed picture of the medieval and early Post-medieval dynamic transformation of this seemingly common house on a standard location plot. Five historical phases may be defined as results of the survey, illustrating the significance of this house within the building history in medieval town surroundings.>> House of medium width (13 m plot), 2nd half of the 13th century, its layout and relation to the neighbor correspond with previously documented houses in the same frontage of Havel's Market. Its development within its plot however is non-standard; it expands fast with immediate partial modifications. Since the beginning its basement (and probably elsewhere) had dual utility premises - phases G Ia-c.>> The house after the fire in 1316, with characteristic emergency reparations after the fire and more extensive later reconstruction still on the same plot - phases GIIa-d.>> Division of the house into two in 1426, which required "exemplary" transformation of the layout from a single house with a central passageway into two houses with a central hall. Improvised and slightly confused in G IIIa+b phases, later clearer in PGR II-III phase.>> Several Post-medieval alterations of the hazardous accesses into the basement in constricted spatial conditions of the divided house.>> Re-joining of the house at the early 19th century, unconsciously renewing the medieval layout principle. ER