The Church of Nossa Senhora da Conceição (Portuguese: Igreja de Nossa Senhora da Conceição Velha) is a church in the civil parish of Madalena, in the municipality of Lisbon.

The Church of Conceição dos Freires, or Conceição Velha, (known as the Church of the Misericórdia) was not included in the original plans to reconstruct the Lisbon riverfront, even though it was partially ruined. Instead, King Joseph gave the monks from the Church of Nossa Senhora da Conceição (which was destroyed) the location of the Misericórdia church, and ordered Pombaline architect Francisco António Ferreira (with the collaboration of Honorato José Correia) in 1770, to rebuild the structure. Once renovations were completed, the clerics of the Conceição, re-occupied the rebuilt Misericórdia Church, and the Brotherhood of the Misericórdia was transferred to the (formerly Jesuit) Church of São Roque.

Francisco António Ferreira, also known as o Cangalhas, reused the lateral entrance, central column, two Manueline windows, the relief of the Misericórdia, and Chapel of the Holy Sacrement, as the new entrance. With this, he reoriented the temple, whose southern entrance became the principal, and the lateral chapel became the presbytery. The main facade, crowned by triangular pediment, is marked by an ornate Manueline portico, with a tympanum that includes the Virgin of the Misericórdia, and figures of nobles and religious clerics. Flanked by comparable Manueline-style windows, the whole group has semblances to the Monastery of the Jerónimos.