The smaller of the two is titled: Kardinal Innitzer's Summerhaus, which dates this piece to 1933 or later, as that was when Innitzer was named Cardinal.

The larger is titled: Stift Melk, which is a Benedictine Abbey built in Baroque style, overlooking the Danube in Melk, Austria.

Both are pencil signed and both indicate they are Orig Rad (original renderings), titled, and signed by the artist. 

Innitzer's Summerhaus may be a Hans Leisch. Stift Melk may also be a Hans Leisch, but to my eye appears to be a different signature, and the style seems somewhat different to me. 

Both are adhered to the backing. Both also have markings indicating they are Austrian in origin.

Additionally, students and residents of Stift Melk created this type of artwork to help support Stift Melk in the mid-20th Century.

DATES:  Hans Leisch popularized this style of original etchings of European architecture on silk in the early 1900s. 

MEASUREMENTS: Stift Melk: 7 3/4" x 9 3/4". Kardinal Innitzer's Summerhaus: 6 3/8" x 8".

CONDITION: Some darkening towards edges of the silk, not encroaching on the art.

SHIPPING: Calculated by location.

Please feel free to ask for additional photos or details if you are interested in these items.

Thank you for looking.