The Church of Santa Madrona is located within the block bounded by Carrer Tapioles, Carrer Blai, Carrer Margarit, and Avinguda del Paral·lel in the Sants-Montjuïc district, with its main façade facing Carrer Tapioles. This late 19th-century religious building functions both as a church and rectory. Of particular historical value, and under special protection, is the rear portal, a Baroque doorway preserved from the earlier church. The church has a cruciform plan, with a single nave flanked by lateral chapels set between the buttresses. The apse lies within the interior courtyard of the block, surrounded by auxiliary constructions behind residential buildings. A small passage connects the apse area to Carrer Margarit, providing a view of the Gate of the Convent of Saint John of Jerusalem. The main façade, oriented east, is symmetrically composed of three sections: the central nave and the lateral chapel wings. A projecting portion of the nave façade houses the entrance and a rose window above a vertically proportioned window with polychrome glass. The entrance portal is rectangular and flanked by columns, rising into four archivolts that meet at a pointed arch. The nave façade expresses the slope of the roof, which is double-pitched, with the chapel roofs following the same slope at a lower height. All eaves are classical stone profiles with small arches beneath. The bell tower rises from the projecting section of the main façade, centrally located, and reaches a height comparable to the nave. Its vertical progression transitions from a square to an octagonal plan, gradually reducing in size. The southern façade is mostly blank, except for a large rose window in the transept façade and small circular windows between the nave buttresses. All roofs are double-pitched, with the crossing crowned by a semi-spherical dome matching the diameter of the central nave. This dome is illuminated by pointed-arch windows in the lantern. The apse is covered by a smaller dome. All façades are constructed with regularly arranged stone ashlar. The church is considered Neo-Gothic due to the stylistic proportions and decorative elements. Artistically notable is the portal of the Convent of Saint John of Jerusalem, fully in stone and embedded in the exterior of the apse. It features a rectangular opening flanked by composite columns and a classical entablature with an oval shield. Above this is a richly decorated Baroque niche, originally housing the image of the titular saint, which has been destroyed.