In the Castilla-La Mancha town of Alarcón, on the Plaza de Santo Domingo, at number 1, it is situated. The church includes a square tower at the base and a rectangle floor plan with a single nave, an apse, and a façade. Only the third bay (groin vault) and the transverse arches of the nave vault were still present. The walls with their original arches were still in place when it was designated as an Asset of Cultural Interest. The sacristy is to the south and the chapel is on the north wall.

The semicircular, groin-vaulted apse has blinded, gently slanted windows that face the interior. The entrance to the side chapel is square and located on the north wall of the preceding body. It has a five-part gothic lacework vault, with the central piece being triangular. The vault is covered with red and black paintings that show snake bodies and heads. The boilermakers and snakes in the Pacheco coat of arms are directly referenced in this graphic design. It appears that Luis Pacheco de Silva was a supporter of the Gothic chapel's building.

According to the pendentives that are still in existence and are adorned with the effigies and emblems of the four evangelists, the sacristy across from this chapel had a square floor plan and was covered in a half-orange dome. The well-drawn Calvary and two other charcoal designs, a pontifical bishopric and a Saint Christopher, were preserved in the left-hand arcosolium.

Three flaring windows with narrow, arched apertures are located in the middle of the north wall's exterior on the same horizontal line as the top of the wall. The entryway has four arches, three-column jambs, inverted cone-shaped capitals, fine surface grooves, and four flared Proto-Gothic arches that meet to form an arcade. A panel of horseshoe arches can be found on the upper edge of the arch, and a band of four-foliated rosettes is arranged in series, following the curve of the arches.

The tower has a wide circumference and a square base at the base of the church. It has three portions that are separated by imposts, and it is capped with a cornice that has two sections under the eaves. On each side, it has a double embrasure with a bells' semicircular arch. The tower's intermediary slabs and the staircase leading to the higher level are vanished. Ashlars are placed in the corners of a masonry-built structure.