Medici Riccardi (then Palazzo de' Medici), the Palazzo Strozzino, the Palazzo Strozzi, and the Palazzo Spinelli. An accurate appraisal of the Rucellai Palace's architectural importance has been hindered by uncertainties concerning when and by whom it was constructed. Traditionally, and supported by some 16th-century sources, it has been dated to the period 1446-51, making the facades of both the Medici and Rucellai palaces contemporaries. In 1974, Charles Mack proposed a two-phase construction history for the palace based upon his interpretation of property descriptions contained in the tax declarations of Giovanni Rucellai, members of his family, and neighbors. In these tax records, the location of property is defined by naming adjacent features be they streets or neighbors. Mack, thus, was able to reconstruct ownership histories for the site now occupied by the palace for pertinent tax year. What Mack discovered substantiates Giovanni Rucellai' own testimony that "out of eight houses, I made one." Eight dwellings did, in fact, once occupy the site of the present Rucellai Palace. Records for the tax year 1446 show that Giovanni Rucellai and his immediate family lived in a house at the corner of the Via della Vigna Nuova and the narrow Via dei Palchetti. Evidently intending to enlarge his living quarters in keeping with his growing financial and civic standing, he had acquired a row of houses along the Via dei Palchetti. Shortly thereafter, the house contiguous to his own along the Via della Vigna Nuova, owned by his mother, passed into Rucellai's hands. Finally (c. 1460), the house adjoining his mother's was added to the growing residential complex. The present internal disposition of the palace testifies to the agglutinative process by which the building evolved. By 1455 one of the Via dei Palchetti houses had been razed and replaced by a courtyard surrounded on three sides by arcades whose round arches were supported by Corinthian columns. A cross-vaulted corridor now linked the courtyard with the Via della Vigna Nuova. Externally, the hodgepodge way in which the Rucellai Palace was created may be seen along the Via dei Palchetti. Standing in the Piazza dei Rucellai, however, the impression given by the celebrated facade is one of harmony and unity. It was to visually solidify the three separate houses along the Via della Vigna Nuova, that Rucellai sought a facade which, furthermore, would testify to his progressive taste and prominent standing within the community. Exactly when